drm/amdgpu/gfx: simplify old firmware warning

Put it on one line to avoid whitespace issues when
printing in the log.

Reviewed-by: Christian König <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c

···
 	}
 
 	if (adev->gfx.cp_fw_write_wait == false)
-		DRM_WARN_ONCE("Warning: check cp_fw_version and update it to realize \
-			      GRBM requires 1-cycle delay in cp firmware\n");
+		DRM_WARN_ONCE("CP firmware version too old, please update!");
 }
 
 

drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c

···
 	    (adev->gfx.mec_feature_version < 46) ||
 	    (adev->gfx.pfp_fw_version < 0x000000b7) ||
 	    (adev->gfx.pfp_feature_version < 46))
-		DRM_WARN_ONCE("Warning: check cp_fw_version and update it to realize \
-			      GRBM requires 1-cycle delay in cp firmware\n");
+		DRM_WARN_ONCE("CP firmware version too old, please update!");
 
 	switch (adev->asic_type) {
 	case CHIP_VEGA10: