x86: broadwell: kconfig: Imply platform specific drivers

Imply Broadwell-specific drivers in the platform Kconfig.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/cpu/broadwell/Kconfig b/arch/x86/cpu/broadwell/Kconfig
index a9a461d..c56f90d 100644
--- a/arch/x86/cpu/broadwell/Kconfig
+++ b/arch/x86/cpu/broadwell/Kconfig
@@ -9,6 +9,12 @@
 	select ARCH_EARLY_INIT_R
 	imply HAVE_INTEL_ME
 	imply ENABLE_MRC_CACHE
+	imply ENV_IS_IN_SPI_FLASH
+	imply ICH_SPI
+	imply INTEL_BROADWELL_GPIO
+	imply SCSI
+	imply SPI_FLASH
+	imply VIDEO_BROADWELL_IGD
 
 if INTEL_BROADWELL
 
diff --git a/configs/chromebook_samus_defconfig b/configs/chromebook_samus_defconfig
index e6d6fd6..2976097 100644
--- a/configs/chromebook_samus_defconfig
+++ b/configs/chromebook_samus_defconfig
@@ -10,7 +10,6 @@
 CONFIG_HAVE_VGA_BIOS=y
 CONFIG_BOOTSTAGE=y
 CONFIG_BOOTSTAGE_REPORT=y
-CONFIG_ENV_IS_IN_SPI_FLASH=y
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_CPU=y
@@ -39,12 +38,9 @@
 CONFIG_EFI_PARTITION=y
 CONFIG_REGMAP=y
 CONFIG_SYSCON=y
-CONFIG_SCSI=y
 CONFIG_CPU=y
-CONFIG_INTEL_BROADWELL_GPIO=y
 CONFIG_CROS_EC=y
 CONFIG_CROS_EC_LPC=y
-CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_GIGADEVICE=y
 CONFIG_SPI_FLASH_MACRONIX=y
 CONFIG_SPI_FLASH_WINBOND=y
@@ -52,12 +48,10 @@
 CONFIG_DEBUG_UART_CLOCK=1843200
 CONFIG_DEBUG_UART_BOARD_INIT=y
 CONFIG_SYS_NS16550=y
-CONFIG_ICH_SPI=y
 CONFIG_TPM_TIS_LPC=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
 CONFIG_FRAMEBUFFER_SET_VESA_MODE=y
 CONFIG_FRAMEBUFFER_VESA_MODE_11A=y
-CONFIG_VIDEO_BROADWELL_IGD=y
 CONFIG_CONSOLE_SCROLL_LINES=5
 CONFIG_TPM=y