zorro: sysfs: Replace sprintf() by sysfs_emit()

zorro: sysfs: Replace sprintf() by sysfs_emit()

Convert sysfs show functions from sprintf() to sysfs_emit(), as
recommended by Documentation/filesystems/sysfs.rst.  This ensures proper
buffer handling and avoids potential buffer overflows.

Signed-off-by: Stefan Pedratscher <pedratscher.stefan@gmail.com>
Tested-by: Daniel Palmer <daniel@thingy.jp>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://patch.msgid.link/20260406172512.6693-1-pedratscher.stefan@gmail.com
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>