thermal: intel: int340x: Use sysfs_emit{_at}() in sysfs show functions

thermal: intel: int340x: Use sysfs_emit{_at}() in sysfs show functions

Replace sprintf() with sysfs_emit() and sysfs_emit_at() in sysfs show
functions.

sysfs_emit() and sysfs_emit_at() are preferred to format sysfs output
as they provide better bounds checking.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
[ rjw: Subject adjustment, changelog edits ]
Link: https://patch.msgid.link/20251220223026.125678-1-thorsten.blum@linux.dev
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>