mmc: uniphier: add driver for UniPhier SD/MMC host controller

Add a driver for the on-chip SD/eMMC host controller used by
UniPhier SoC family.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index c9c3e3e..b85e4bf 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -41,6 +41,7 @@
 obj-$(CONFIG_SOCFPGA_DWMMC) += socfpga_dw_mmc.o
 obj-$(CONFIG_SPEAR_SDHCI) += spear_sdhci.o
 obj-$(CONFIG_TEGRA_MMC) += tegra_mmc.o
+obj-$(CONFIG_MMC_UNIPHIER) += uniphier-sd.o
 obj-$(CONFIG_ZYNQ_SDHCI) += zynq_sdhci.o
 
 ifdef CONFIG_SPL_BUILD