zorro: Use str_plural() in amiga_zorro_probe()

Use the existing str_plural() function rather than duplicating its
implementation.

./drivers/zorro/zorro.c:155:22-39: opportunity for str_plural(zorro_num_autocon).

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=9350


Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20240618073205.65303-1-jiapeng.chong@linux.alibaba.com


Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>