[fastboot] revert `getvar product` to `galilei`

Partially revert change 04c540adaff to return to the old `getvar
product`. This is load-bearing in infra since some release branches pin
old versions of `flash.sh` which require this product name.

Bug: b/316595754
Change-Id: Ibbeca5a0095b4e67ed1c0a06f9dec78fa98258bd
Reviewed-on: https://turquoise-internal-review.googlesource.com/c/third_party/u-boot/+/790670
Reviewed-by: Drew Fisher <zarvox@google.com>
GitOrigin-RevId: 954ea90c4fd37e53ab0aeaf4b485c35276a83707
diff --git a/drivers/usb/gadget/f_fastboot.c b/drivers/usb/gadget/f_fastboot.c
index c6d2051..301f133 100644
--- a/drivers/usb/gadget/f_fastboot.c
+++ b/drivers/usb/gadget/f_fastboot.c
@@ -52,7 +52,9 @@
 
 #define ENDPOINT_MAXIMUM_PACKET_SIZE_2_0  (0x0200)
 
-#define DEVICE_PRODUCT	"vim3"
+#ifdef CONFIG_DEVICE_PRODUCT
+#define DEVICE_PRODUCT	CONFIG_DEVICE_PRODUCT
+#endif
 
 #define FB_ERR(fmt ...) printf("[ERR]%sL%d:", __func__, __LINE__),printf(fmt)
 #define FB_MSG(fmt ...) printf("[MSG]"fmt)