drm/amd/amdgpu: Add missing newline in DRM_DEBUG_DRIVER message

This error message was emitted without a newline during bring-up on
FreeBSD.  Presumably the error doesn't occur on Linux so was not noticed
before.

Signed-off-by: Ed Maste <emaste@FreeBSD.org>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1108,7 +1108,7 @@ static int amdgpu_acpi_enumerate_xcc(void)
 		 * one is not found, no need to check the rest.
 		 */
 		if (!acpi_dev) {
-			DRM_DEBUG_DRIVER("No matching acpi device found for %s",
+			DRM_DEBUG_DRIVER("No matching acpi device found for %s\n",
 					 hid);
 			break;
 		}