Convert CONFIG_CMD_ESBC_VALIDATE to Kconfig

This converts the following to Kconfig:
   CONFIG_CMD_ESBC_VALIDATE

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

arch/arm/include/asm/fsl_secure_boot.h

@@ -8,7 +8,6 @@
 #define __FSL_SECURE_BOOT_H
 
 #ifdef CONFIG_CHAIN_OF_TRUST
-#define CONFIG_CMD_ESBC_VALIDATE
 #define CONFIG_FSL_SEC_MON
 
 #ifdef CONFIG_SPL_BUILD

arch/powerpc/include/asm/fsl_secure_boot.h

@@ -99,7 +99,6 @@
 #define CONFIG_SPL_UBOOT_KEY_HASH	NULL
 #endif /* ifdef CONFIG_SPL_BUILD */
 
-#define CONFIG_CMD_ESBC_VALIDATE
 #define CONFIG_FSL_SEC_MON
 
 #ifndef CONFIG_SPL_BUILD

board/freescale/common/Kconfig

@@ -7,3 +7,12 @@ config CHAIN_OF_TRUST
 	select SHA_PROG_HW_ACCEL
 	bool
 	default y
+
+config CMD_ESBC_VALIDATE
+	bool "Enable the 'esbc_validate' and 'esbc_halt' commands"
+	default y if CHAIN_OF_TRUST
+	help
+	  This option enables two commands used for secure booting:
+
+	    esbc_validate - validate signature using RSA verification
+	    esbc_halt - put the core in spin loop (Secure Boot Only)

scripts/config_whitelist.txt

@@ -383,7 +383,6 @@ CONFIG_CM922T_XA10
 CONFIG_CMDLINE_EDITING
 CONFIG_CMDLINE_PS_SUPPORT
 CONFIG_CMDLINE_TAG
-CONFIG_CMD_ESBC_VALIDATE
 CONFIG_CMD_ETHSW
 CONFIG_CMD_FDC
 CONFIG_CMD_FDT_MAX_DUMP