ARM: OMAP2: AM33XX: id: Add support for AM335x PG2.0

Add support for chip id recognition of AM335x PG2.0 silicon. By default
omap3xxx_check_revision() recognizes PG1.0, which is extended by adding
PG2.0 support

Signed-off-by: AnilKumar Ch <anilkumar@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
index 45cc7ed4..8a68f1e 100644
--- a/arch/arm/mach-omap2/id.c
+++ b/arch/arm/mach-omap2/id.c
@@ -399,8 +399,18 @@
 		}
 		break;
 	case 0xb944:
-		omap_revision = AM335X_REV_ES1_0;
-		cpu_rev = "1.0";
+		switch (rev) {
+		case 0:
+			omap_revision = AM335X_REV_ES1_0;
+			cpu_rev = "1.0";
+			break;
+		case 1:
+		/* FALLTHROUGH */
+		default:
+			omap_revision = AM335X_REV_ES2_0;
+			cpu_rev = "2.0";
+			break;
+		}
 		break;
 	case 0xb8f2:
 		switch (rev) {