omap: emif: fix bug in manufacturer code test

Code currently tests for <= 0xff.  Micron manufacturer code is 0xff, so
Micron memory will not be detected!

Signed-off-by: Steve Sakoman <steve@sakoman.com>
diff --git a/arch/arm/cpu/armv7/omap-common/emif-common.c b/arch/arm/cpu/armv7/omap-common/emif-common.c
index 61ade4c..7c2352c 100644
--- a/arch/arm/cpu/armv7/omap-common/emif-common.c
+++ b/arch/arm/cpu/armv7/omap-common/emif-common.c
@@ -947,7 +947,7 @@
 	}
 
 	mr = get_mr(base, cs, LPDDR2_MR5);
-	if (mr >= 0xFF) {
+	if (mr > 0xFF) {
 		/* Mode register value bigger than 8 bit */
 		return 0;
 	}