disp: msm: sde: update check flags to handle CONFIG_DEBUG_FS

Add support to handle disabling of CONFIG_DEBUG_FS.

Change-Id: I8c07434afc36edfae9bd9bc7880d07264eca7650
Signed-off-by: Krishna Manikandan <mkrishn@codeaurora.org>
Signed-off-by: Samantha Tran <samtran@codeaurora.org>

msm/sde/sde_crtc.c

@@ -166,6 +166,7 @@ static void _sde_crtc_deinit_events(struct sde_crtc *sde_crtc)
 		return;
 }
 
+#ifdef CONFIG_DEBUG_FS
 static int _sde_debugfs_fps_status_show(struct seq_file *s, void *data)
 {
 	struct sde_crtc *sde_crtc;
@@ -212,6 +213,7 @@ static int _sde_debugfs_fps_status(struct inode *inode, struct file *file)
 	return single_open(file, _sde_debugfs_fps_status_show,
 			inode->i_private);
 }
+#endif
 
 static ssize_t fps_periodicity_ms_store(struct device *device,
 		struct device_attribute *attr, const char *buf, size_t count)