Add support for Exynos-M2.

Change-Id: I646f303b460556a9b36a44574f25dd992d42906c
Signed-off-by: Junmo Park <junmoz.park@samsung.com>

cc/config/arm_device.go

@@ -182,6 +182,7 @@ func init() {
 		"cortex-a73",
 		"krait",
 		"kryo",
+		"exynos-m2",
 		"denver")
 
 	android.RegisterArchVariantFeatures(android.Arm, "armv7-a-neon", "neon")
@@ -274,6 +275,7 @@ var (
 		"cortex-a73":     "${config.ArmCortexA53Cflags}",
 		"krait":          "${config.ArmKraitCflags}",
 		"kryo":           "${config.ArmKryoCflags}",
+		"exynos-m2":      "${config.ArmCortexA53Cflags}",
 		"denver":         "${config.ArmCortexA15Cflags}",
 	}
 
@@ -293,6 +295,7 @@ var (
 		"cortex-a73":     "${config.ArmClangCortexA53Cflags}",
 		"krait":          "${config.ArmClangKraitCflags}",
 		"kryo":           "${config.ArmClangKryoCflags}",
+		"exynos-m2":      "${config.ArmClangCortexA53Cflags}",
 		"denver":         "${config.ArmClangCortexA15Cflags}",
 	}
 )