omap-common: fastboot: extend cpu type for DRA71x rev 2.1

DRA71x processors are reduced pin and software compatible
derivative of DRA72 processors. Extend support for this
revision in "getvar cpu" command.

Signed-off-by: Vishal Mahaveer <vishalm@ti.com>
[praneeth@ti.com: rebase to u-boot master]
Signed-off-by: Praneeth Bajjuri <praneeth@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

arch/arm/mach-omap2/utils.c

@@ -33,6 +33,7 @@ static void omap_set_fastboot_cpu(void)
 		break;
 	case DRA722_ES1_0:
 	case DRA722_ES2_0:
+	case DRA722_ES2_1:
 		cpu = "DRA722";
 		break;
 	default: