mmc: replace CONFIG_GENERIC_MMC with CONFIG_MMC

Now CONFIG_GENERIC_MMC and CONFIG_MMC match for all defconfig.
We do not need two options for the same feature.  Deprecate the
former.

This commit was generated with the sed script 's/GENERIC_MMC/MMC/'
and manual fixup of drivers/mmc/Kconfig.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/board/logicpd/zoom1/zoom1.c b/board/logicpd/zoom1/zoom1.c
index 0fad23a..e91f874 100644
--- a/board/logicpd/zoom1/zoom1.c
+++ b/board/logicpd/zoom1/zoom1.c
@@ -106,7 +106,7 @@
 	MUX_ZOOM1_MDK();
 }
 
-#ifdef CONFIG_GENERIC_MMC
+#ifdef CONFIG_MMC
 int board_mmc_init(bd_t *bis)
 {
 	return omap_mmc_init(0, 0, 0, -1, -1);