drm/amdgpu: change vcn dec rb command specific for decode

Signed-off-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h
index 5dbc6aa..5506568 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h
@@ -30,12 +30,12 @@
 #define AMDGPU_VCN_FIRMWARE_OFFSET	256
 #define AMDGPU_VCN_MAX_ENC_RINGS	3
 
-#define VCN_CMD_FENCE			0x00000000
-#define VCN_CMD_TRAP			0x00000001
-#define VCN_CMD_WRITE_REG		0x00000004
-#define VCN_CMD_REG_READ_COND_WAIT	0x00000006
-#define VCN_CMD_PACKET_START		0x0000000a
-#define VCN_CMD_PACKET_END		0x0000000b
+#define VCN_DEC_CMD_FENCE		0x00000000
+#define VCN_DEC_CMD_TRAP		0x00000001
+#define VCN_DEC_CMD_WRITE_REG		0x00000004
+#define VCN_DEC_CMD_REG_READ_COND_WAIT	0x00000006
+#define VCN_DEC_CMD_PACKET_START	0x0000000a
+#define VCN_DEC_CMD_PACKET_END		0x0000000b
 
 struct amdgpu_vcn {
 	struct amdgpu_bo	*vcpu_bo;