drm/amdgpu: Fix uninitialized variable in gfxhub_v1_2_xcp_resume

drivers/gpu/drm/amd/amdgpu/gfxhub_v1_2.c:657:6: error: variable 'ret' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized]
        if (!amdgpu_sriov_vf(adev))
            ^~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/gfxhub_v1_2.c:660:9: note: uninitialized use occurs here
        return ret;
               ^~~
drivers/gpu/drm/amd/amdgpu/gfxhub_v1_2.c:657:2: note: remove the 'if' if its condition is always true
        if (!amdgpu_sriov_vf(adev))
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/gfxhub_v1_2.c:648:9: note: initialize the variable 'ret' to silence this warning
        int ret;
               ^
                = 0
1 error generated.

Cc: Luben Tuikov <luben.tuikov@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Lijo Lazar <lijo.lazar@amd.com>
Cc: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfxhub_v1_2.c

@@ -645,7 +645,6 @@ static int gfxhub_v1_2_xcp_resume(void *handle, uint32_t inst_mask)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 	bool value;
-	int ret;
 
 	if (amdgpu_vm_fault_stop == AMDGPU_VM_FAULT_STOP_ALWAYS)
 		value = false;
@@ -655,9 +654,9 @@ static int gfxhub_v1_2_xcp_resume(void *handle, uint32_t inst_mask)
 	gfxhub_v1_2_xcc_set_fault_enable_default(adev, value, inst_mask);
 
 	if (!amdgpu_sriov_vf(adev))
-		ret = gfxhub_v1_2_xcc_gart_enable(adev, inst_mask);
+		return gfxhub_v1_2_xcc_gart_enable(adev, inst_mask);
 
-	return ret;
+	return 0;
 }
 
 static int gfxhub_v1_2_xcp_suspend(void *handle, uint32_t inst_mask)