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/chromebook_speedy_defconfig b/configs/chromebook_speedy_defconfig
index 8d42f0a..dbdf0dd 100644
--- a/configs/chromebook_speedy_defconfig
+++ b/configs/chromebook_speedy_defconfig
@@ -7,7 +7,7 @@
 CONFIG_DEFAULT_DEVICE_TREE="rk3288-veyron-speedy"
 CONFIG_SPL_TEXT_BASE=0xff704000
 CONFIG_ROCKCHIP_RK3288=y
-# CONFIG_SPL_MMC_SUPPORT is not set
+# CONFIG_SPL_MMC is not set
 CONFIG_TARGET_CHROMEBOOK_SPEEDY=y
 CONFIG_SPL_STACK_R_ADDR=0x80000
 CONFIG_DEBUG_UART_BASE=0xff690000