PXA: Balloon3 board support

The following hardware is currently supported:
- UART
- USB Host
- FPGA

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>

MAINTAINERS

diff --git a/MAINTAINERS b/MAINTAINERS
index 303e955..3dea70ab 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -811,6 +811,7 @@
 
 Marek Vasut <marek.vasut@gmail.com>
 
+	balloon3	xscale
 	palmld		xscale
 	palmtc		xscale
 	vpac270		xscale