platform: Enable SD card boot feature

SDCC2 clock configuration and init power for SD
required for enabling of boot from SD feature.

Change-Id: Idfe6ee21cbefff150f330b31d22afe254d658e2f
diff --git a/platform/msm8996/acpuclock.c b/platform/msm8996/acpuclock.c
index ff0b55c..c218838 100644
--- a/platform/msm8996/acpuclock.c
+++ b/platform/msm8996/acpuclock.c
@@ -98,6 +98,10 @@
 	{
 		ret = clk_get_set_enable(clk_name, 192000000, true);
 	}
+	else if(freq == MMC_CLK_200MHZ)
+	{
+		ret = clk_get_set_enable(clk_name, 200000000, 1);
+	}
 	else if(freq == MMC_CLK_400MHZ)
 	{
 		ret = clk_get_set_enable(clk_name, 384000000, 1);