eeepc-laptop.c: use pr_fmt and pr_<level>

Convert the unusual printk(EEEPC_<level> uses to
the more standard pr_fmt and pr_<level>(.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>