board: phytec: Add PHYTEC mailing list to MAINTAINERS entries

PHYTEC maintains an actively monitored mailing list for upstream
activities: upstream@lists.phytec.de. Add it to the MAINTAINERS
entries for PHYTEC boards we actively develop and contribute to.

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Acked-by: Teresa Remmet <t.remmet@phytec.de>
diff --git a/board/phytec/imx8mp-libra-fpsc/MAINTAINERS b/board/phytec/imx8mp-libra-fpsc/MAINTAINERS
index 1fd9988..c2d24b7 100644
--- a/board/phytec/imx8mp-libra-fpsc/MAINTAINERS
+++ b/board/phytec/imx8mp-libra-fpsc/MAINTAINERS
@@ -1,5 +1,6 @@
 Libra-i.MX 8M Plus
 M:	Teresa Remmet <t.remmet@phytec.de>
+L:	upstream@lists.phytec.de
 W:	https://www.phytec.eu/en/produkte/system-on-modules/phycore-imx-8m-plus-fpsc/
 S:	Maintained
 F:	arch/arm/dts/imx8mp-libra-rdk-fpsc-u-boot.dtsi
diff --git a/board/phytec/phycore_am62ax/MAINTAINERS b/board/phytec/phycore_am62ax/MAINTAINERS
index feb1e0b..ded4a88 100644
--- a/board/phytec/phycore_am62ax/MAINTAINERS
+++ b/board/phytec/phycore_am62ax/MAINTAINERS
@@ -1,6 +1,7 @@
 phyCORE-AM62ax
 M:	Garrett Giordano <ggiordano@phytec.com>
 M:	Wadim Egorov <w.egorov@phytec.de>
+L:	upstream@lists.phytec.de
 W:	https://www.phytec.com/product/phycore-am62a
 S:	Maintained
 F:	arch/arm/dts/k3-am62a-phycore-som-binman.dtsi
diff --git a/board/phytec/phycore_am62x/MAINTAINERS b/board/phytec/phycore_am62x/MAINTAINERS
index 274dc0c..7274e6a 100644
--- a/board/phytec/phycore_am62x/MAINTAINERS
+++ b/board/phytec/phycore_am62x/MAINTAINERS
@@ -1,5 +1,6 @@
 phyCORE-AM62x
 M:	Wadim Egorov <w.egorov@phytec.de>
+L:	upstream@lists.phytec.de
 W:	https://www.phytec.com/product/phycore-am62x
 S:	Maintained
 F:	arch/arm/dts/k3-am62-phycore-som-ddr4-2gb.dtsi
diff --git a/board/phytec/phycore_am64x/MAINTAINERS b/board/phytec/phycore_am64x/MAINTAINERS
index f5294db..0ba5039 100644
--- a/board/phytec/phycore_am64x/MAINTAINERS
+++ b/board/phytec/phycore_am64x/MAINTAINERS
@@ -1,5 +1,6 @@
 phyCORE-AM64x
 M:	Wadim Egorov <w.egorov@phytec.de>
+L:	upstream@lists.phytec.de
 W:	https://www.phytec.com/product/phycore-am64x
 S:	Maintained
 F:	arch/arm/dts/k3-am64-phycore-som-ddr4-2gb.dtsi
diff --git a/board/phytec/phycore_imx8mm/MAINTAINERS b/board/phytec/phycore_imx8mm/MAINTAINERS
index 58c5e2d..5cada15 100644
--- a/board/phytec/phycore_imx8mm/MAINTAINERS
+++ b/board/phytec/phycore_imx8mm/MAINTAINERS
@@ -1,5 +1,6 @@
 phyCORE-i.MX8M Mini
 M:      Teresa Remmet <t.remmet@phytec.de>
+L:      upstream@lists.phytec.de
 W:      https://www.phytec.eu/product-eu/system-on-modules/phycore-imx-8m-mini-nano/
 S:      Maintained
 F:      arch/arm/dts/imx8mm-phyboard-polis-rdk-u-boot.dtsi
diff --git a/board/phytec/phycore_imx8mp/MAINTAINERS b/board/phytec/phycore_imx8mp/MAINTAINERS
index 645476a..9343e3b 100644
--- a/board/phytec/phycore_imx8mp/MAINTAINERS
+++ b/board/phytec/phycore_imx8mp/MAINTAINERS
@@ -1,5 +1,6 @@
 phyCORE-i.MX8M Plus
 M:      Teresa Remmet <t.remmet@phytec.de>
+L:      upstream@lists.phytec.de
 W:      https://www.phytec.eu/product-eu/system-on-modules/phycore-imx-8m-plus/
 S:      Maintained
 F:      arch/arm/dts/imx8mp-phyboard-pollux-rdk-u-boot.dtsi
diff --git a/board/phytec/phycore_imx93/MAINTAINERS b/board/phytec/phycore_imx93/MAINTAINERS
index 7393061..0b087bf 100644
--- a/board/phytec/phycore_imx93/MAINTAINERS
+++ b/board/phytec/phycore_imx93/MAINTAINERS
@@ -1,6 +1,7 @@
 phyCORE-i.MX93
 M:      Mathieu Othacehe <m.othacehe@gmail.com>
 R:      Christoph Stoidner <c.stoidner@phytec.de>
+L:      upstream@lists.phytec.de
 W:      https://www.phytec.eu/en/produkte/system-on-modules/phycore-imx-91-93/
 S:      Maintained
 F:      arch/arm/dts/imx93-phyboard-segin-u-boot.dtsi
diff --git a/board/phytec/phycore_rk3288/MAINTAINERS b/board/phytec/phycore_rk3288/MAINTAINERS
index e3b0af9..a7ab023 100644
--- a/board/phytec/phycore_rk3288/MAINTAINERS
+++ b/board/phytec/phycore_rk3288/MAINTAINERS
@@ -1,5 +1,6 @@
 phyCORE-RK3288
 M:	Wadim Egorov <w.egorov@phytec.de>
+L:	upstream@lists.phytec.de
 S:	Maintained
 F:	arch/arm/dts/rk3288-phycore-rdk-u-boot.dtsi
 F:	board/phytec/phycore_rk3288