mmc: sandbox: rename CONFIG, fix dependency, and use it in Makefile

[1] Rename CONFIG_SANDBOX_MMC to CONFIG_MMC_SANDBOX for consistency
    I want all MMC driver options prefixed with CONFIG_MMC_.

[2] Fix dependency
    Add necessary depends on to avoid compile error.
    Instead "depends on MMC" is unneeded because this config entry
    resides inside of "if MMC".

[3] Currently, this config symbol is not referenced at all.
    Use it to enable/disable the driver in Makefile.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

configs/sandbox_defconfig

@@ -94,7 +94,7 @@ CONFIG_CROS_EC_SPI=y
 CONFIG_PWRSEQ=y
 CONFIG_SPL_PWRSEQ=y
 CONFIG_I2C_EEPROM=y
-CONFIG_SANDBOX_MMC=y
+CONFIG_MMC_SANDBOX=y
 CONFIG_SPI_FLASH_SANDBOX=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_ATMEL=y

configs/sandbox_spl_defconfig

@@ -104,7 +104,7 @@ CONFIG_CROS_EC_SANDBOX=y
 CONFIG_CROS_EC_SPI=y
 CONFIG_PWRSEQ=y
 CONFIG_SPL_PWRSEQ=y
-CONFIG_SANDBOX_MMC=y
+CONFIG_MMC_SANDBOX=y
 CONFIG_SPI_FLASH_SANDBOX=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_ATMEL=y

drivers/mmc/Kconfig

@@ -187,9 +187,10 @@ config MMC_UNIPHIER
 	help
 	  This selects support for the SD/MMC Host Controller on UniPhier SoCs.
 
-config SANDBOX_MMC
+config MMC_SANDBOX
 	bool "Sandbox MMC support"
-	depends on MMC && SANDBOX
+	depends on SANDBOX
+	depends on BLK && DM_MMC_OPS && OF_CONTROL
 	help
 	  This select a dummy sandbox MMC driver. At present this does nothing
 	  other than allow sandbox to be build with MMC support. This

drivers/mmc/Makefile

@@ -40,11 +40,7 @@ obj-$(CONFIG_X86) += pci_mmc.o
 obj-$(CONFIG_PXA_MMC_GENERIC) += pxa_mmc_gen.o
 obj-$(CONFIG_SUPPORT_EMMC_RPMB) += rpmb.o
 obj-$(CONFIG_S3C_SDI) += s3c_sdi.o
-ifdef CONFIG_BLK
-ifdef CONFIG_GENERIC_MMC
-obj-$(CONFIG_SANDBOX) += sandbox_mmc.o
-endif
-endif
+obj-$(CONFIG_MMC_SANDBOX)		+= sandbox_mmc.o
 obj-$(CONFIG_SH_MMCIF) += sh_mmcif.o
 obj-$(CONFIG_SH_SDHI) += sh_sdhi.o
 obj-$(CONFIG_ZYNQ_SDHCI) += zynq_sdhci.o