mb/google/corsola: Add new board 'steelix'

Add a new kingler follower 'steelix'.

BUG=b:232195941
TEST=make # select steelix

Change-Id: Idd2ed1404cde72ecdb6cc3a262e793a6272aa871
Signed-off-by: Zanxi Chen <chenzanxi@huaqin.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64789
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: wen zhang <zhangwen6@huaqin.corp-partner.google.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>

src/mainboard/google/corsola/Kconfig

@@ -50,6 +50,7 @@ config MAINBOARD_PART_NUMBER
 	string
 	default "Kingler" if BOARD_GOOGLE_KINGLER
 	default "Krabby" if BOARD_GOOGLE_KRABBY
+	default "Steelix" if BOARD_GOOGLE_STEELIX
 
 config BOOT_DEVICE_SPI_FLASH_BUS
 	int

src/mainboard/google/corsola/Kconfig.name

@@ -4,6 +4,10 @@ config BOARD_GOOGLE_KINGLER
 	bool "->  Kingler"
 	select BOARD_GOOGLE_KINGLER_COMMON
 
+config BOARD_GOOGLE_STEELIX
+	bool "->  Steelix"
+	select BOARD_GOOGLE_KINGLER_COMMON
+
 comment "Krabby"
 
 config BOARD_GOOGLE_KRABBY