gpu: drm: amd/radeon: Convert printk(KERN_<LEVEL> to pr_<level>

Use a more common logging style.

Miscellanea:

o Coalesce formats and realign arguments
o Neaten a few macros now using pr_<level>

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 0b6b576..d1b1e0c 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -2486,7 +2486,7 @@ void evergreen_pcie_gart_tlb_flush(struct radeon_device *rdev)
 		tmp = RREG32(VM_CONTEXT0_REQUEST_RESPONSE);
 		tmp = (tmp & RESPONSE_TYPE_MASK) >> RESPONSE_TYPE_SHIFT;
 		if (tmp == 2) {
-			printk(KERN_WARNING "[drm] r600 flush TLB failed\n");
+			pr_warn("[drm] r600 flush TLB failed\n");
 			return;
 		}
 		if (tmp) {