ARM: OMAP: ID: Chip detection for OMAP4470

Add support for detection of the next chip in the OMAP4 family: OMAP4470 ES1.0

For more details on OMAP4470, visit:
http://focus.ti.com/general/docs/wtbu/wtbuproductcontent.tsp?templateId=6123&navigationId=12869&contentId=123362

Signed-off-by: Leonid Iziumtsev <x0153368@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/id.c

@@ -371,7 +371,7 @@ static void __init omap4_check_revision(void)
 	 * Few initial 4430 ES2.0 samples IDCODE is same as ES1.0
 	 * Use ARM register to detect the correct ES version
 	 */
-	if (!rev && (hawkeye != 0xb94e)) {
+	if (!rev && (hawkeye != 0xb94e) && (hawkeye != 0xb975)) {
 		idcode = read_cpuid(CPUID_ID);
 		rev = (idcode & 0xf) - 1;
 	}
@@ -408,6 +408,14 @@ static void __init omap4_check_revision(void)
 			break;
 		}
 		break;
+	case 0xb975:
+		switch (rev) {
+		case 0:
+		default:
+			omap_revision = OMAP4470_REV_ES1_0;
+			break;
+		}
+		break;
 	default:
 		/* Unknown default to latest silicon rev as default */
 		omap_revision = OMAP4430_REV_ES2_3;