rk30 hdmi:

rk30 hdmi:
	1. When hdmi was disabled in early_suspend, sometimes it will be enabld agian by user control.
	   So the hdmi irq will be enabled twice in early_resume, this action will caurse kernel crash.
	   To fix this bug, we need to distinguish suspend mode and user control mode, and add mutex to
	   protect enable/disable hdmi irq.
	2. Use spin_lock_irqsave/spin_unlock_irqrestore replace spin_lock/spin_unlock.