mmc: Add mmc driver for Sunplus SP7021

This is a patch for mmc driver for Sunplus SP7021 SOC.
Supports eMMC 4.41 DDR 104MB/s speed mode.

Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Tony Huang <tonyhuang.sunplus@gmail.com>
Link: https://lore.kernel.org/r/c92d67596f3cc10d41585b9ab82be7da2cc4c9d8.1669023361.git.tonyhuang.sunplus@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

MAINTAINERS

@@ -19758,6 +19758,7 @@ M:	Tony Huang <tonyhuang.sunplus@gmail.com>
 M:	Li-hao Kuo <lhjeff911@gmail.com>
 S:	Maintained
 F:	Documentation/devicetree/bindings/mmc/sunplus,mmc.yaml
+F:	drivers/mmc/host/sunplus-mmc.c
 
 SUNPLUS OCOTP DRIVER
 M:	Vincent Shih <vincent.sunplus@gmail.com>

drivers/mmc/host/Kconfig

@@ -14,6 +14,15 @@ config MMC_DEBUG
 	  added host drivers please don't invent their private macro for
 	  debugging.
 
+config MMC_SUNPLUS
+	tristate "Sunplus SP7021 MMC Controller"
+	depends on ARCH_SUNPLUS || COMPILE_TEST
+	help
+	  If you say yes here, you will get support for eMMC host interface
+	  on Sunplus SoCs.
+
+	  If unsure, say N
+
 config MMC_ARMMMCI
 	tristate "ARM AMBA Multimedia Card Interface support"
 	depends on ARM_AMBA

drivers/mmc/host/Makefile

@@ -97,6 +97,7 @@ obj-$(CONFIG_MMC_SDHCI_MICROCHIP_PIC32)	+= sdhci-pic32.o
 obj-$(CONFIG_MMC_SDHCI_BRCMSTB)		+= sdhci-brcmstb.o
 obj-$(CONFIG_MMC_SDHCI_OMAP)		+= sdhci-omap.o
 obj-$(CONFIG_MMC_SDHCI_SPRD)		+= sdhci-sprd.o
+obj-$(CONFIG_MMC_SUNPLUS)		+= sunplus-mmc.o
 obj-$(CONFIG_MMC_CQHCI)			+= cqhci.o
 cqhci-y					+= cqhci-core.o
 cqhci-$(CONFIG_MMC_CRYPTO)		+= cqhci-crypto.o