Convert CONFIG_CMD_GSC to Kconfig

This converts the following to Kconfig:
   CONFIG_CMD_GSC

Signed-off-by: Simon Glass <sjg@chromium.org>

board/gateworks/gw_ventana/Kconfig

@@ -14,4 +14,12 @@ config CMD_EECONFIG
 	help
 	  Provides access to EEPROM configuration on Gateworks Ventana
 
+config CMD_GSC
+	bool "Enable the 'gsc' command"
+	help
+	  Provides access to the GSC configuration:
+
+	     gsc sleep - sleeps for a period of seconds
+	     gsc wd - enables / disables the watchdog
+
 endif

configs/gwventana_emmc_defconfig

@@ -5,6 +5,7 @@ CONFIG_SPL_LIBCOMMON_SUPPORT=y
 CONFIG_SPL_LIBGENERIC_SUPPORT=y
 CONFIG_TARGET_GW_VENTANA=y
 CONFIG_CMD_EECONFIG=y
+CONFIG_CMD_GSC=y
 CONFIG_SPL_MMC_SUPPORT=y
 CONFIG_SPL_SERIAL_SUPPORT=y
 CONFIG_SPL_WATCHDOG_SUPPORT=y

configs/gwventana_gw5904_defconfig

@@ -5,6 +5,7 @@ CONFIG_SPL_LIBCOMMON_SUPPORT=y
 CONFIG_SPL_LIBGENERIC_SUPPORT=y
 CONFIG_TARGET_GW_VENTANA=y
 CONFIG_CMD_EECONFIG=y
+CONFIG_CMD_GSC=y
 CONFIG_SPL_MMC_SUPPORT=y
 CONFIG_SPL_SERIAL_SUPPORT=y
 CONFIG_SPL_WATCHDOG_SUPPORT=y

configs/gwventana_nand_defconfig

@@ -5,6 +5,7 @@ CONFIG_SPL_LIBCOMMON_SUPPORT=y
 CONFIG_SPL_LIBGENERIC_SUPPORT=y
 CONFIG_TARGET_GW_VENTANA=y
 CONFIG_CMD_EECONFIG=y
+CONFIG_CMD_GSC=y
 CONFIG_SPL_MMC_SUPPORT=y
 CONFIG_SPL_SERIAL_SUPPORT=y
 CONFIG_SPL_NAND_SUPPORT=y

include/configs/gw_ventana.h

@@ -141,7 +141,6 @@
 
 /* Various command support */
 #define CONFIG_CMD_HDMIDETECT    /* detect HDMI output device */
-#define CONFIG_CMD_GSC
 #define CONFIG_CMD_UNZIP         /* gzwrite */
 #define CONFIG_RBTREE
 

include/configs/pcm058.h

@@ -87,7 +87,6 @@
 
 /* Various command support */
 #define CONFIG_CMD_HDMIDETECT    /* detect HDMI output device */
-#define CONFIG_CMD_GSC
 #define CONFIG_RBTREE
 
 /* Physical Memory Map */

scripts/config_whitelist.txt

@@ -383,7 +383,6 @@ CONFIG_CM922T_XA10
 CONFIG_CMDLINE_EDITING
 CONFIG_CMDLINE_PS_SUPPORT
 CONFIG_CMDLINE_TAG
-CONFIG_CMD_GSC
 CONFIG_CMD_HASH
 CONFIG_CMD_HD44760
 CONFIG_CMD_HD44780