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>

arch/arm/mach-omap2/id.c

@@ -399,9 +399,19 @@ void __init omap3xxx_check_revision(void)
 		}
 		break;
 	case 0xb944:
+		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) {
 		case 0:

arch/arm/mach-omap2/soc.h

@@ -387,6 +387,7 @@ IS_OMAP_TYPE(3430, 0x3430)
 
 #define AM335X_CLASS		0x33500033
 #define AM335X_REV_ES1_0	AM335X_CLASS
+#define AM335X_REV_ES2_0	(AM335X_CLASS | (0x1 << 8))
 
 #define OMAP443X_CLASS		0x44300044
 #define OMAP4430_REV_ES1_0	(OMAP443X_CLASS | (0x10 << 8))