drm/amdgpu: fix invadate operation for pg_flags

Since the type of pg_flags is u32, adev->pg_flags >> 16 >> 16 is 0
regardless of the values of its operands.

So removing the operations upper_32_bits and lower_32_bits.
Signed-off-by: Jesse Zhang <Jesse.Zhang@amd.com>
Suggested-by: Tim Huang <Tim.Huang@amd.com>
Reviewed-by: Tim Huang <Tim.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -918,7 +918,7 @@ static ssize_t amdgpu_debugfs_gca_config_read(struct file *f, char __user *buf,
 
 	/* rev==1 */
 	config[no_regs++] = adev->rev_id;
-	config[no_regs++] = lower_32_bits(adev->pg_flags);
+	config[no_regs++] = adev->pg_flags;
 	config[no_regs++] = lower_32_bits(adev->cg_flags);
 
 	/* rev==2 */
@@ -935,7 +935,7 @@ static ssize_t amdgpu_debugfs_gca_config_read(struct file *f, char __user *buf,
 	config[no_regs++] = adev->flags & AMD_IS_APU ? 1 : 0;
 
 	/* rev==5 PG/CG flag upper 32bit */
-	config[no_regs++] = upper_32_bits(adev->pg_flags);
+	config[no_regs++] = 0;
 	config[no_regs++] = upper_32_bits(adev->cg_flags);
 
 	while (size && (*pos < no_regs * 4)) {