mmc: Rename MMC_SUPPORT to MMC

Rename these options so that CONFIG_IS_ENABLED can be used with them.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
[trini: Fixup some incorrect renames]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/common/spl/Makefile b/common/spl/Makefile
index c576a78..29ac624 100644
--- a/common/spl/Makefile
+++ b/common/spl/Makefile
@@ -20,7 +20,7 @@
 endif
 obj-$(CONFIG_$(SPL_TPL_)UBI) += spl_ubi.o
 obj-$(CONFIG_$(SPL_TPL_)NET_SUPPORT) += spl_net.o
-obj-$(CONFIG_$(SPL_TPL_)MMC_SUPPORT) += spl_mmc.o
+obj-$(CONFIG_$(SPL_TPL_)MMC) += spl_mmc.o
 obj-$(CONFIG_$(SPL_TPL_)ATF) += spl_atf.o
 obj-$(CONFIG_$(SPL_TPL_)OPTEE) += spl_optee.o
 obj-$(CONFIG_$(SPL_TPL_)OPENSBI) += spl_opensbi.o