mb/google/brya/variants/gimble: init overridetree for gimble

init overridetree.cb based on the schematic carbine_adl-p_proto_20210618_proto final.pdf

BUG=b:191213263
TEST=USE="project_gimble emerge-brya coreboot" and verify it builds
without error.

Signed-off-by: Mark Hsieh <mark_hsieh@wistron.corp-partner.google.com>
Change-Id: I3f6875ef438b147436605629445d346a56896a87
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55781
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/mainboard/google/brya/Kconfig.name

@@ -17,3 +17,5 @@ config BOARD_GOOGLE_GIMBLE
 	bool "-> Gimble"
 	select BOARD_GOOGLE_BASEBOARD_BRYA
 	select BASEBOARD_BRYA_LAPTOP
+	select CHROMEOS_DSM_CALIB if CHROMEOS
+	select DRIVERS_I2C_MAX98390