mmc: Kconfig: Add Arasan SDHCI entry

Add Arasan SDHCI entry to Kconfig and fix all references.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index 9f4b766..9d3f7e9 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -37,4 +37,10 @@
 	help
 	  Support for Microchip PIC32 SDHCI controller.
 
+config ZYNQ_SDHCI
+	bool "Arasan SDHCI controller support"
+	depends on DM_MMC && OF_CONTROL
+	help
+	  Support for Arasan SDHCI host controller on Zynq/ZynqMP ARM SoCs platform
+
 endmenu