Convert pci_module_init() to pci_register_driver().

[ Compile-tested with "allyes", "allmod" & "allno" on i386. ]
Signed-off-by: NRichard Knutsson <ricknu-0@student.ltu.se>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>