drm/radeon: use raw buffer printk specifier

printk format strings accepting a single subsequent argument
are shorter thus easier to read.

Instead of having format strings accepting 3 different arguments
pointing to first 3 bytes of the same buffer rewrite the format
string to accept only one argument - the buffer - with "%3ph"
specifier.
Signed-off-by: Dmitry Rozhkov <dmitry.rozhkov@linux.intel.com>
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon_dp_mst.c

@@ -718,7 +718,7 @@ radeon_dp_mst_check_status(struct radeon_connector *radeon_connector)
 				       DP_SINK_COUNT_ESI, esi, 8);
 go_again:
 		if (dret == 8) {
-			DRM_DEBUG_KMS("got esi %02x %02x %02x\n", esi[0], esi[1], esi[2]);
+			DRM_DEBUG_KMS("got esi %3ph\n", esi);
 			ret = drm_dp_mst_hpd_irq(&radeon_connector->mst_mgr, esi, &handled);
 
 			if (handled) {
@@ -733,7 +733,7 @@ radeon_dp_mst_check_status(struct radeon_connector *radeon_connector)
 				dret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux,
 							DP_SINK_COUNT_ESI, esi, 8);
 				if (dret == 8) {
-					DRM_DEBUG_KMS("got esi2 %02x %02x %02x\n", esi[0], esi[1], esi[2]);
+					DRM_DEBUG_KMS("got esi2 %3ph\n", esi);
 					goto go_again;
 				}
 			} else