ata: libata-transport: replace scnprintf with sysfs_emit for simple attributes

ata: libata-transport: replace scnprintf with sysfs_emit for simple attributes

sprintf, snprintf, and scnprintf do not consider the PAGE_SIZE maximum
of the temporary buffer used for outputting sysfs content and they may
overrun the PAGE_SIZE buffer length.

To avoid output defects with the ATA transport class simple attributes,
use sysfs_emit instead of scnprintf().

This aligns with the sysfs guidance provided in
Documentation/filesystems/sysfs.rst.

Signed-off-by: Jonathan Velez <jonvelez12345@gmail.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20250709133330.3546-1-jonvelez12345@gmail.com
Signed-off-by: Niklas Cassel <cassel@kernel.org>