Input: i8042 - fix PNP modaliases when both aux and kdb are enabled

Commit 78551277e4 exposed the PNP modaliases for the i8042 module. However,
when both the aux and the kbd drivers are enabled the aux entries would
override the kdb ones.

Refactor the device_id lists, and unconditionally attempt to load the driver
if either a kdb or aux devices is present.

Signed-off-by: Tom Gundersen <teg@jklm.no>