msm: compilation fixes for gcc 4.6

These changes are required to compile successfully with
gcc version 4.6.

Change-Id: I79ec71e62748069da754e918f8497d28c1ff33ae
Signed-off-by: Steve Muckle <smuckle@codeaurora.org>
diff --git a/arch/arm/mach-msm/board-msm7627a-io.c b/arch/arm/mach-msm/board-msm7627a-io.c
index ec168f9..22095cd 100644
--- a/arch/arm/mach-msm/board-msm7627a-io.c
+++ b/arch/arm/mach-msm/board-msm7627a-io.c
@@ -229,7 +229,7 @@
 
 static int mxt_vkey_setup(void)
 {
-	int retval;
+	int retval = 0;
 
 	mxt_virtual_key_properties_kobj =
 		kobject_create_and_add("board_properties", NULL);