Convert CONFIG_SPL_MTD_SUPPORT to Kconfig

Move this option to Kconfig and tidy up existing uses.

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

configs/pengwyn_defconfig

@@ -12,6 +12,7 @@ CONFIG_SPL_ENV_SUPPORT=y
 CONFIG_VERSION_VARIABLE=y
 CONFIG_SPL=y
 CONFIG_SPL_ETH_SUPPORT=y
+CONFIG_SPL_MTD_SUPPORT=y
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
 # CONFIG_CMD_IMLS is not set

include/configs/am3517_evm.h

@@ -349,7 +349,6 @@
 #define CONFIG_SPL_NAND_BASE
 #define CONFIG_SPL_NAND_DRIVERS
 #define CONFIG_SPL_NAND_ECC
-#define CONFIG_SPL_MTD_SUPPORT
 #define CONFIG_SPL_POWER_SUPPORT
 #define CONFIG_SPL_LDSCRIPT		"$(CPUDIR)/omap-common/u-boot-spl.lds"
 

include/configs/devkit8000.h

@@ -199,7 +199,6 @@
 #define CONFIG_SYS_SRAM_SIZE               0x10000
 
 /* Defines for SPL */
-#undef CONFIG_SPL_MTD_SUPPORT
 
 #undef CONFIG_SPL_TEXT_BASE
 #define CONFIG_SPL_TEXT_BASE		0x40200000 /*CONFIG_SYS_SRAM_START*/

include/configs/ti_armv7_common.h

@@ -272,7 +272,6 @@
 #define CONFIG_SPL_NAND_BASE
 #define CONFIG_SPL_NAND_DRIVERS
 #define CONFIG_SPL_NAND_ECC
-#define CONFIG_SPL_MTD_SUPPORT
 #define CONFIG_SYS_NAND_U_BOOT_START	CONFIG_SYS_TEXT_BASE
 #endif
 #endif /* !CONFIG_NOR_BOOT */