disp: msm: sde: provide rm status through debugfs node

Provide rm status through debugfs node.
cat /d/dri/0/debug/rm_status.

Change-Id: Ic1950b1881f0b57582701a342793aa06adb9da39
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>

msm/sde/sde_kms.c

@@ -154,6 +154,7 @@ static int _sde_debugfs_init(struct sde_kms *sde_kms)
 		SDE_ERROR("failed to init perf %d\n", rc);
 		return rc;
 	}
+	sde_rm_debugfs_init(&sde_kms->rm, debugfs_root);
 
 	if (sde_kms->catalog->qdss_count)
 		debugfs_create_u32("qdss", 0600, debugfs_root,