drm/amdgpu: remove set but not used variable 'psp_enabled'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/gpu/drm/amd/amdgpu/nv.c: In function 'nv_common_early_init':
drivers/gpu/drm/amd/amdgpu/nv.c:471:7: warning:
 variable 'psp_enabled' set but not used [-Wunused-but-set-variable]

It's not used since inroduction in
commit c6b6a421 ("drm/amdgpu: add navi10 common ip block (v3)")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -576,7 +576,6 @@ static const struct amdgpu_asic_funcs nv_asic_funcs =
 
 static int nv_common_early_init(void *handle)
 {
-	bool psp_enabled = false;
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
 	adev->smc_rreg = NULL;
@@ -593,10 +592,6 @@ static int nv_common_early_init(void *handle)
 
 	adev->asic_funcs = &nv_asic_funcs;
 
-	if (amdgpu_device_ip_get_ip_block(adev, AMD_IP_BLOCK_TYPE_PSP) &&
-	    (amdgpu_ip_block_mask & (1 << AMD_IP_BLOCK_TYPE_PSP)))
-		psp_enabled = true;
-
 	adev->rev_id = nv_get_rev_id(adev);
 	adev->external_rev_id = 0xff;
 	switch (adev->asic_type) {