Fix compilation of AMD GX2 northbridge code with gcc 4.6

Change-Id: I71d96b7cd36dd99a3590ec311c11f67f13012e68
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/267
Tested-by: build bot (Jenkins)
Reviewed-by: Uwe Hermann <uwe@hermann-uwe.de>
diff --git a/src/northbridge/amd/gx2/northbridgeinit.c b/src/northbridge/amd/gx2/northbridgeinit.c
index fd8d3f9..e4aaa8b 100644
--- a/src/northbridge/amd/gx2/northbridgeinit.c
+++ b/src/northbridge/amd/gx2/northbridgeinit.c
@@ -485,7 +485,7 @@
 
 static void GeodeLinkPriority(void)
 {
-	msr_t msr;
+	msr_t msr = { 0, 0 };
 	struct msrinit *prio = GeodeLinkPriorityTable;
 	int i;
 
@@ -526,7 +526,7 @@
 	/* ok this is whacky bit translation time. */
 	int bit;
 	uint8_t shadowByte;
-	msr_t msr;
+	msr_t msr = { 0, 0 };
 	shadowByte = (uint8_t) (shadowLo >> 16);
 
 	/* load up D000 settings in edx. */