drm/radeon: add Mullins chip family

Mullins is a new CI-based APU.

Signed-off-by: Samuel Li <samuel.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index b8a24a7..be20e62 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -2516,6 +2516,7 @@
 		break;
 	case CHIP_KAVERI:
 	case CHIP_KABINI:
+	case CHIP_MULLINS:
 		rdev->asic = &kv_asic;
 		/* set num crtcs */
 		if (rdev->family == CHIP_KAVERI) {
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 511fe26..0e770bb 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -99,6 +99,7 @@
 	"KAVERI",
 	"KABINI",
 	"HAWAII",
+	"MULLINS",
 	"LAST",
 };
 
diff --git a/drivers/gpu/drm/radeon/radeon_family.h b/drivers/gpu/drm/radeon/radeon_family.h
index 9da5da4..4b7b87f 100644
--- a/drivers/gpu/drm/radeon/radeon_family.h
+++ b/drivers/gpu/drm/radeon/radeon_family.h
@@ -97,6 +97,7 @@
 	CHIP_KAVERI,
 	CHIP_KABINI,
 	CHIP_HAWAII,
+	CHIP_MULLINS,
 	CHIP_LAST,
 };