mb/google/brya: Create gimble variant

Create the gimble variant of the brya0 reference board by copying
the template files to a new directory named for the variant.

(Auto-Generated by create_coreboot_variant.sh version 4.5.0).

BUG=b:190334274
BRANCH=None
TEST=util/abuild/abuild -p none -t google/brya -x -a
make sure the build includes GOOGLE_GIMBLE

Change-Id: If425571d95b3b20910f890428fb5726ebad2fdf4
Signed-off-by: Mark Hsieh <mark_hsieh@wistron.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55300
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/google/brya/Kconfig b/src/mainboard/google/brya/Kconfig
index c51aca8..b863d8d 100644
--- a/src/mainboard/google/brya/Kconfig
+++ b/src/mainboard/google/brya/Kconfig
@@ -75,11 +75,13 @@
 	string
 	default "Brya" if BOARD_GOOGLE_BRYA0
 	default "Primus" if BOARD_GOOGLE_PRIMUS
+	default "Gimble" if BOARD_GOOGLE_GIMBLE
 
 config VARIANT_DIR
 	string
 	default "brya0" if BOARD_GOOGLE_BRYA0
 	default "primus" if BOARD_GOOGLE_PRIMUS
+	default "gimble" if BOARD_GOOGLE_GIMBLE
 
 config DIMM_SPD_SIZE
 	int