mb/google/bluey: Enable GBB_FLAG_ENABLE_ADB for development

Select GBB_FLAG_ENABLE_ADB in Kconfig for the Bluey board. This is
required to support ADB debugging during the current development
phase.

Note: This is intended as a temporary measure (FIXME) and should
likely be reverted before production.

Change-Id: I9c8c2a315fcf91e4b51d25ee4e00490db7e33486
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/91720
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>

src/mainboard/google/bluey/Kconfig

@@ -3,6 +3,8 @@
 config BOARD_GOOGLE_BLUEY_COMMON
 	def_bool n
 	select COMMON_CBFS_SPI_WRAPPER
+	# FIXME: keep ADB for development phase
+	select GBB_FLAG_ENABLE_ADB if VBOOT
 	select MAINBOARD_HAS_CHROMEOS
 	select SPI_FLASH
 	select SPI_FLASH_FORCE_4_BYTE_ADDR_MODE