drm: prefer inline over __inline__

Remove last users of __inline__.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180327204722.31246-1-jani.nikula@intel.com

include/drm/drmP.h

@@ -123,8 +123,7 @@ static inline bool drm_drv_uses_atomic_modeset(struct drm_device *dev)
 #define DRM_SWITCH_POWER_CHANGING 2
 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
 
-static __inline__ int drm_core_check_feature(struct drm_device *dev,
-					     int feature)
+static inline int drm_core_check_feature(struct drm_device *dev, int feature)
 {
 	return ((dev->driver->driver_features & feature) ? 1 : 0);
 }
@@ -143,7 +142,7 @@ static __inline__ int drm_core_check_feature(struct drm_device *dev,
 /*@}*/
 
 /* returns true if currently okay to sleep */
-static __inline__ bool drm_can_sleep(void)
+static inline bool drm_can_sleep(void)
 {
 	if (in_atomic() || in_dbg_master() || irqs_disabled())
 		return false;

include/drm/drm_legacy.h

@@ -194,8 +194,8 @@ void drm_legacy_ioremap(struct drm_local_map *map, struct drm_device *dev);
 void drm_legacy_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
 void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
 
-static __inline__ struct drm_local_map *drm_legacy_findmap(struct drm_device *dev,
-							   unsigned int token)
+static inline struct drm_local_map *drm_legacy_findmap(struct drm_device *dev,
+						       unsigned int token)
 {
 	struct drm_map_list *_entry;
 	list_for_each_entry(_entry, &dev->maplist, head)