Convert CONFIG_SPL_NAND_RAW_ONLY et al to Kconfig

This converts the following to Kconfig:
   CONFIG_SPL_NAND_RAW_ONLY
   CONFIG_SPL_NAND_SOFTECC

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/smartweb_defconfig b/configs/smartweb_defconfig
index a9f90e9..b3c6d23 100644
--- a/configs/smartweb_defconfig
+++ b/configs/smartweb_defconfig
@@ -33,8 +33,10 @@
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_BOARD_EARLY_INIT_F=y
 CONFIG_SPL_NAND_SUPPORT=y
+CONFIG_SPL_NAND_RAW_ONLY=y
 CONFIG_SPL_NAND_DRIVERS=y
 CONFIG_SPL_NAND_ECC=y
+CONFIG_SPL_NAND_SOFTECC=y
 CONFIG_SPL_NAND_BASE=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="U-Boot# "