drm/radeon: ERROR: "(foo*)" should be "(foo *)"

Fix four occurrences of the checkpatch.pl error:
ERROR: "(foo*)" should be "(foo *)"

Signed-off-by: Ran Sun <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/radeon/radeon_test.c

···
 					  i, *vram_start, gtt_start,
 					  (unsigned long long)
 					  (gtt_addr - rdev->mc.gtt_start +
-					   (void*)gtt_start - gtt_map),
+					   (void *)gtt_start - gtt_map),
 					  (unsigned long long)
 					  (vram_addr - rdev->mc.vram_start +
-					   (void*)gtt_start - gtt_map));
+					   (void *)gtt_start - gtt_map));
 				radeon_bo_kunmap(vram_obj);
 				goto out_lclean_unpin;
 			}
···
 					  i, *gtt_start, vram_start,
 					  (unsigned long long)
 					  (vram_addr - rdev->mc.vram_start +
-					   (void*)vram_start - vram_map),
+					   (void *)vram_start - vram_map),
 					  (unsigned long long)
 					  (gtt_addr - rdev->mc.gtt_start +
-					   (void*)vram_start - vram_map));
+					   (void *)vram_start - vram_map));
 				radeon_bo_kunmap(gtt_obj[i]);
 				goto out_lclean_unpin;
 			}