include:libata: fix boolreturn.cocci warnings

./include/linux/libata.h:1462:8-9:WARNING: return of 0/1 in function
'ata_is_host_link' with return type bool

Return statements in functions returning bool should use true/false
instead of 1/0.

Generated by: scripts/coccinelle/misc/boolreturn.cocci

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Jing Yangyang <jing.yangyang@zte.com.cn>
Link: https://lore.kernel.org/r/20210824060702.59006-1-deng.changcheng@zte.com.cn
Signed-off-by: Jens Axboe <axboe@kernel.dk>