drm/radeon/kms: add cayman chip family

Cayman is DCE5 display plus a new 4-way shader block.
3D state programming is similar to evergreen.
Signed-off-by: NAlex Deucher <alexdeucher@gmail.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/radeon_device.c

@@ -85,6 +85,7 @@ static const char radeon_family_name[][16] = {
 	"BARTS",
 	"TURKS",
 	"CAICOS",
+	"CAYMAN",
 	"LAST",
 };
 

drivers/gpu/drm/radeon/radeon_family.h

@@ -84,6 +84,7 @@ enum radeon_family {
 	CHIP_BARTS,
 	CHIP_TURKS,
 	CHIP_CAICOS,
+	CHIP_CAYMAN,
 	CHIP_LAST,
 };