Convert CONFIG_ENV_IS_IN_SPI_FLASH to Kconfig

This converts the following to Kconfig:
   CONFIG_ENV_IS_IN_SPI_FLASH

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/chromebook_link_defconfig b/configs/chromebook_link_defconfig
index 3105fed..461266d 100644
--- a/configs/chromebook_link_defconfig
+++ b/configs/chromebook_link_defconfig
@@ -11,6 +11,7 @@
 CONFIG_FIT=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
@@ -40,8 +41,6 @@
 CONFIG_OF_CONTROL=y
 CONFIG_REGMAP=y
 CONFIG_SYSCON=y
-CONFIG_SCSI=y
-CONFIG_DM_SCSI=y
 CONFIG_BLK=y
 CONFIG_CPU=y
 CONFIG_DM_I2C=y
@@ -54,6 +53,8 @@
 CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_DM_PCI=y
 CONFIG_DM_RTC=y
+CONFIG_SCSI=y
+CONFIG_DM_SCSI=y
 CONFIG_DEBUG_UART_BASE=0x3f8
 CONFIG_DEBUG_UART_CLOCK=1843200
 CONFIG_DEBUG_UART_BOARD_INIT=y