mmc: move DesignWare-based drivers to Kconfig

Move (and rename) the following CONFIG options to Kconfig:

  CONFIG_EXYNOS_DWMMC  (renamed to CONFIG_MMC_DW_EXYNOS)
  CONFIG_HIKEY_DWMMC   (renamed to CONFIG_MMC_DW_K3)
  CONFIG_SOCFPGA_DWMMC (renamed to CONFIG_MMC_DW_SOCFPGA)

The "HIKEY" is a board name, so it is not suitable for the MMC
controller name.  I am following the name used in Linux.

This commit was generated as follows:

[1] Rename the config options with the following command:
find . -name .git -prune -o ! -path ./scripts/config_whitelist.txt \
-type f -print | xargs sed -i -e '
s/CONFIG_EXYNOS_DWMMC/CONFIG_MMC_DW_EXYNOS/g
s/CONFIG_HIKEY_DWMMC/CONFIG_MMC_DW_K3/g
s/CONFIG_SOCFPGA_DWMMC/CONFIG_MMC_DW_SOCFPGA/g
'

[2] Commit the changes

[3] Create the entries in drivers/mmc/Kconfig
    (with default y for EXYNOS and SOCFPGA)

[4] Run the following:
tools/moveconfig.py -y -r HEAD MMC_DW_EXYNOS MMC_DW_K3 MMC_DW_SOCFPGA

[5] Sort and align drivers/mmc/Makefile for readability

[6] Clean-up doc/README.socfpga by hand

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Marek Vasut <marex@denx.de>
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index 1c51a7a..4494bdaea 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -17,9 +17,11 @@
 obj-$(CONFIG_ATMEL_SDHCI) += atmel_sdhci.o
 obj-$(CONFIG_BFIN_SDH) += bfin_sdh.o
 obj-$(CONFIG_DAVINCI_MMC) += davinci_mmc.o
-obj-$(CONFIG_MMC_DW) += dw_mmc.o
-obj-$(CONFIG_EXYNOS_DWMMC) += exynos_dw_mmc.o
-obj-$(CONFIG_HIKEY_DWMMC) += hi6220_dw_mmc.o
+obj-$(CONFIG_MMC_DW)			+= dw_mmc.o
+obj-$(CONFIG_MMC_DW_EXYNOS)		+= exynos_dw_mmc.o
+obj-$(CONFIG_MMC_DW_K3)			+= hi6220_dw_mmc.o
+obj-$(CONFIG_MMC_DW_ROCKCHIP)		+= rockchip_dw_mmc.o
+obj-$(CONFIG_MMC_DW_SOCFPGA)		+= socfpga_dw_mmc.o
 obj-$(CONFIG_FSL_ESDHC) += fsl_esdhc.o
 obj-$(CONFIG_FTSDC010) += ftsdc010_mci.o
 obj-$(CONFIG_FTSDC021) += ftsdc021_sdhci.o
@@ -36,7 +38,6 @@
 obj-$(CONFIG_OMAP_HSMMC) += omap_hsmmc.o
 obj-$(CONFIG_X86) += pci_mmc.o
 obj-$(CONFIG_PXA_MMC_GENERIC) += pxa_mmc_gen.o
-obj-$(CONFIG_MMC_DW_ROCKCHIP) += rockchip_dw_mmc.o
 obj-$(CONFIG_SUPPORT_EMMC_RPMB) += rpmb.o
 obj-$(CONFIG_S3C_SDI) += s3c_sdi.o
 ifdef CONFIG_BLK
@@ -46,7 +47,6 @@
 endif
 obj-$(CONFIG_SH_MMCIF) += sh_mmcif.o
 obj-$(CONFIG_SH_SDHI) += sh_sdhi.o
-obj-$(CONFIG_SOCFPGA_DWMMC) += socfpga_dw_mmc.o
 obj-$(CONFIG_TEGRA_MMC) += tegra_mmc.o
 obj-$(CONFIG_MMC_UNIPHIER) += uniphier-sd.o
 obj-$(CONFIG_ZYNQ_SDHCI) += zynq_sdhci.o