msm8960: Cache scratch address & enable 8bit mode for mmc driver

Change-Id: I7bac3066a7fe41db9e760953176f4b44a80148c4
diff --git a/target/msm8960/init.c b/target/msm8960/init.c
index b7d1548..e1f67e1 100644
--- a/target/msm8960/init.c
+++ b/target/msm8960/init.c
@@ -466,3 +466,8 @@
 			apq8064_ext_3p3V_enable();
 	}
 }
+
+int target_mmc_bus_width()
+{
+	return MMC_BOOT_BUS_WIDTH_8_BIT;
+}