drm: drm_context.c: Adjust end of block comment

Add a new line with */ on the last line of a block comment to follow the
Linux kernel coding conventions.
Problem found by checkpatch.
Signed-off-by: Beatriz Martins de Carvalho <martinsdecarvalhobeatriz@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/341b1ae1475fad22035cf3ff11df73cd49063d4c.1618756333.git.martinsdecarvalhobeatriz@gmail.com

drivers/gpu/drm/drm_context.c

@@ -312,7 +312,8 @@ static int drm_context_switch_complete(struct drm_device *dev,
 
 	/* If a context switch is ever initiated
 	   when the kernel holds the lock, release
-	   that lock here. */
+	   that lock here.
+	 */
 	clear_bit(0, &dev->context_flag);
 
 	return 0;