rbd: fix -Wreturn-type warnings

/git/arm-soc/drivers/block/rbd.c: In function 'rbd_img_is_write':
/git/arm-soc/drivers/block/rbd.c:1397:1: error: control reaches end of non-void function [-Werror=return-type]
 }
 ^
/git/arm-soc/drivers/block/rbd.c: In function '__rbd_obj_handle_request':
/git/arm-soc/drivers/block/rbd.c:2499:1: error: control reaches end of non-void function [-Werror=return-type]
 }
 ^
/git/arm-soc/drivers/block/rbd.c: In function 'rbd_obj_handle_write':
/git/arm-soc/drivers/block/rbd.c:2471:1: error: control reaches end of non-void function [-Werror=return-type]
 }

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
1 file changed