project: Add SDHCI support for Ferrum

Add SDHCI support for Ferrum.

Change-Id: I786cd52bd043e2facb7d8b05812e4bf3b2d92d88
diff --git a/project/ferrum.mk b/project/ferrum.mk
index 9ecf46c..2ffb029 100644
--- a/project/ferrum.mk
+++ b/project/ferrum.mk
@@ -24,6 +24,12 @@
 #Disable thumb mode
 ENABLE_THUMB := false
 
+ENABLE_SDHCI_SUPPORT := 1
+
+ifeq ($(ENABLE_SDHCI_SUPPORT),1)
+DEFINES += MMC_SDHCI_SUPPORT=1
+endif
+
 ifeq ($(EMMC_BOOT),1)
 DEFINES += _EMMC_BOOT=1
 endif