drm/amdgpu/sdma4: specify raven2 firmware.

use raven2 sdma firmware.
Signed-off-by: Feifei Xu <Feifei.Xu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c

@@ -49,6 +49,7 @@ MODULE_FIRMWARE("amdgpu/vega20_sdma.bin");
 MODULE_FIRMWARE("amdgpu/vega20_sdma1.bin");
 MODULE_FIRMWARE("amdgpu/raven_sdma.bin");
 MODULE_FIRMWARE("amdgpu/picasso_sdma.bin");
+MODULE_FIRMWARE("amdgpu/raven2_sdma.bin");
 
 #define SDMA0_POWER_CNTL__ON_OFF_CONDITION_HOLD_TIME_MASK  0x000000F8L
 #define SDMA0_POWER_CNTL__ON_OFF_STATUS_DURATION_TIME_MASK 0xFC000000L
@@ -269,6 +270,9 @@ static int sdma_v4_0_init_microcode(struct amdgpu_device *adev)
 		chip_name = "vega20";
 		break;
 	case CHIP_RAVEN:
+		if (adev->rev_id >= 8)
+			chip_name = "raven2";
+		else
 			chip_name = "raven";
 		break;
 	case CHIP_PICASSO: