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/r2dplus_defconfig b/configs/r2dplus_defconfig
index f4df61a..bd553be 100644
--- a/configs/r2dplus_defconfig
+++ b/configs/r2dplus_defconfig
@@ -2,4 +2,6 @@
 CONFIG_TARGET_R2DPLUS=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_PING=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_EXT2=y
 CONFIG_USE_PRIVATE_LIBGCC=y