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/configs/imxrt1020-evk_defconfig b/configs/imxrt1020-evk_defconfig
index 5f9cf21..07b57d6 100644
--- a/configs/imxrt1020-evk_defconfig
+++ b/configs/imxrt1020-evk_defconfig
@@ -12,7 +12,7 @@
 CONFIG_DEFAULT_DEVICE_TREE="imxrt1020-evk"
 CONFIG_SPL_TEXT_BASE=0x20209000
 CONFIG_TARGET_IMXRT1020_EVK=y
-CONFIG_SPL_MMC_SUPPORT=y
+CONFIG_SPL_MMC=y
 CONFIG_SPL_SERIAL_SUPPORT=y
 CONFIG_SPL_SIZE_LIMIT=0x20000
 CONFIG_SPL=y