[PATCH] cdrom: use unsigned bitfields

Fix 23 of these sparse warnings on x86_64 allmodconfig:
include/linux/cdrom.h:942:19: error: dubious bitfield without explicit
`signed' or `unsigned'

Signed-off-by: Randy Dunlap <[e-mail]>
Cc: Jens Axboe <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

include/linux/cdrom.h

···
 	int speed;			/* maximum speed for reading data */
 	int capacity;			/* number of discs in jukebox */
 /* device-related storage */
-	int options		: 30;	/* options flags */
+	unsigned int options	: 30;	/* options flags */
 	unsigned mc_flags	: 2;	/* media change buffer flags */
     	int use_count;                  /* number of times device opened */
     	char name[20];                  /* name of the device type */