drm/vmwgfx: Add a new define for vmwgfx user-space debugging

Error messages or debugging message reported during user-space command
submission should not be printed to dmesg by default. So add a new
preprocessor define called VMW_DEBUG_USER which translates to
DRM_DEBUG_DRIVER.

v2: Use VMW_DEBUG_USER instead of using DRM_DEBUG_DRIVER directly.

Signed-off-by: Deepak Rawat <drawat@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>

drivers/gpu/drm/vmwgfx/vmwgfx_validation.c

@@ -325,8 +325,7 @@ int vmw_validation_add_resource(struct vmw_validation_context *ctx,
 
 	node = vmw_validation_mem_alloc(ctx, sizeof(*node) + priv_size);
 	if (!node) {
-		DRM_ERROR("Failed to allocate a resource validation "
-			  "entry.\n");
+		VMW_DEBUG_USER("Failed to allocate a resource validation entry.\n");
 		return -ENOMEM;
 	}