block: sed-opal: Don't include <linux/kernel.h>

There is no need to include <linux/kernel.h> here.

Prefer the less invasive <linux/types.h> and <linux/compiler_types.h>
which are needed in this .h file itself.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/c1d479b39e30fe70c4579a1af035d4db49421f56.1670069909.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Jens Axboe <axboe@kernel.dk>