google/kukui: Add SPI NOR support

This patch sets SPI flash related configs and inits SPI bus 1 to
support SPI NOR flash.

BUG=b:80501386
BRANCH=none
TEST=Boots correctly on Kukui

Change-Id: I1a18a456f41a7c7daec954e961c9fbee3650493d
Signed-off-by: Tristan Shieh <tristan.shieh@mediatek.com>
Reviewed-on: https://review.coreboot.org/27499
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/mainboard/google/kukui/Kconfig

@@ -6,11 +6,12 @@ config VBOOT
 config BOARD_SPECIFIC_OPTIONS
 	def_bool y
 	select SOC_MEDIATEK_MT8183
-	select BOARD_ROMSIZE_KB_4096
+	select BOARD_ROMSIZE_KB_8192
 	select MAINBOARD_HAS_CHROMEOS
 	select COMMON_CBFS_SPI_WRAPPER
 	select SPI_FLASH
 	select FATAL_ASSERTS
+	select SPI_FLASH_INCLUDE_ALL_DRIVERS
 
 config MAINBOARD_DIR
 	string
@@ -20,4 +21,8 @@ config MAINBOARD_PART_NUMBER
 	string
 	default "Kukui"
 
+config BOOT_DEVICE_SPI_FLASH_BUS
+	int
+	default 1
+
 endif