configs: Re-sync with cmd/Kconfig

Update the config.h and defconfig files for the commands that 8e3c036
converted over to Kconfig

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/smdk2410_defconfig b/configs/smdk2410_defconfig
index 39375de..702b36c 100644
--- a/configs/smdk2410_defconfig
+++ b/configs/smdk2410_defconfig
@@ -6,3 +6,6 @@
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_PING=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_EXT2=y
+CONFIG_CMD_FAT=y