drivers/mmc: move spl_mmc.c to common/spl

The mpc85xx repuires a special layout on the memory device that is
connected to the eSDHC controller interface. But the file spl_mmc.c
didn't handle this specfic case, there needs a special treatmen, in
the powerpc drictory. So, there is no longer to keep spl_mmc.c on
mpc85xx, CONFIG_SPL_FRAMEWORK is not set.

When CONFIG_SPL_MMC_SUPPORT is set and CONFIG_SPL_FRAMEWORK is not
set, there was an error in drivers/mmc/spl_mmc.c:

drivers/mmc/libmmc.o:(.got2+0x8): undefined reference to `spl_image'.

Now, the solution is to move the file "spl_mmc.c" to directory "common/spl".

Signed-off-by: Ying Zhang <b40530@freescale.com>
diff --git a/common/spl/Makefile b/common/spl/Makefile
index da2afc1..a74563c 100644
--- a/common/spl/Makefile
+++ b/common/spl/Makefile
@@ -20,6 +20,7 @@
 COBJS-$(CONFIG_SPL_NAND_SUPPORT) += spl_nand.o
 COBJS-$(CONFIG_SPL_ONENAND_SUPPORT) += spl_onenand.o
 COBJS-$(CONFIG_SPL_NET_SUPPORT) += spl_net.o
+COBJS-$(CONFIG_SPL_MMC_SUPPORT) += spl_mmc.o
 endif
 
 COBJS	:= $(sort $(COBJS-y))
diff --git a/drivers/mmc/spl_mmc.c b/common/spl/spl_mmc.c
similarity index 100%
rename from drivers/mmc/spl_mmc.c
rename to common/spl/spl_mmc.c
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index fb6b502..196ef9b 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -25,9 +25,6 @@
 
 LIB	:= $(obj)libmmc.o
 
-ifdef CONFIG_SPL_BUILD
-COBJS-$(CONFIG_SPL_MMC_SUPPORT) += spl_mmc.o
-endif
 
 COBJS-$(CONFIG_BFIN_SDH) += bfin_sdh.o
 COBJS-$(CONFIG_DAVINCI_MMC) += davinci_mmc.o