drm/amdgpu/nv: export common IP functions

So they can be driven by IP dicovery table.
Reviewed-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

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

@@ -599,7 +599,7 @@ static void nv_enable_doorbell_aperture(struct amdgpu_device *adev,
 	adev->nbio.funcs->enable_doorbell_selfring_aperture(adev, enable);
 }
 
-static const struct amdgpu_ip_block_version nv_common_ip_block =
+const struct amdgpu_ip_block_version nv_common_ip_block =
 {
 	.type = AMD_IP_BLOCK_TYPE_COMMON,
 	.major = 1,

drivers/gpu/drm/amd/amdgpu/nv.h

@@ -26,6 +26,8 @@
 
 #include "nbio_v2_3.h"
 
+extern const struct amdgpu_ip_block_version nv_common_ip_block;
+
 void nv_grbm_select(struct amdgpu_device *adev,
 		    u32 me, u32 pipe, u32 queue, u32 vmid);
 void nv_set_virt_ops(struct amdgpu_device *adev);