drm: update lock flags from userspace

#define DRM_MAX_ORDER	22	  /**< Up to 2^22 bytes = 4MB */

#define DRM_RAM_PERCENT 10	  /**< How much system ram can we lock? */

#define _DRM_LOCK_HELD	0x80000000 /**< Hardware lock is held */

#define _DRM_LOCK_CONT	0x40000000 /**< Hardware lock is contended */

#define _DRM_LOCK_HELD	0x80000000U /**< Hardware lock is held */

#define _DRM_LOCK_CONT	0x40000000U /**< Hardware lock is contended */

#define _DRM_LOCK_IS_HELD(lock)	   ((lock) & _DRM_LOCK_HELD)

#define _DRM_LOCK_IS_CONT(lock)	   ((lock) & _DRM_LOCK_CONT)

#define _DRM_LOCKING_CONTEXT(lock) ((lock) & ~(_DRM_LOCK_HELD|_DRM_LOCK_CONT))