drm/lib: Include <linux/prandom.h> instead of <linux/random.h>

Substitute the inclusion of <linux/random.h> header with
<linux/prandom.h> to allow the removal of legacy inclusion
of <linux/prandom.h> from <linux/random.h>.

Signed-off-by: Uros Bizjak <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Cc: Maxime Ripard <[email protected]>
Cc: Thomas Zimmermann <[email protected]>
Cc: David Airlie <[email protected]>
Cc: Daniel Vetter <[email protected]>
Signed-off-by: Jason A. Donenfeld <[email protected]>

Author: ubizjak

drivers/gpu/drm/lib/drm_random.h

@@ -6,7 +6,7 @@
  * be transposed to lib/ at the earliest convenience.
  */
 
-#include <linux/random.h>
+#include <linux/prandom.h>
 
 #define DRM_RND_STATE_INITIALIZER(seed__) ({				\
 	struct rnd_state state__;					\