mei: bus: replace sprintf/scnprintf with sysfs_emit in show functions

Update all device attribute show callbacks in the MEI bus driver to use
sysfs_emit(), as recommended by Documentation/filesystems/sysfs.rst.

This improves consistency and aligns with current sysfs guidelines,
even though the existing use of sprintf/scnprintf is functionally safe.

Signed-off-by: Moon Hee Lee <moonhee.lee.ca@gmail.com>
Acked-by: Alexander Usyskin <alexander.usyskin@intel.com>
Link: https://lore.kernel.org/r/20250620181144.10750-1-moonhee.lee.ca@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>