hwdb/keyboard: fix KP_Enter on Clevo PA70ES

hwdb/keyboard: fix KP_Enter on Clevo PA70ES

The ITE keyboard controller firmware (version 0xAB83) is shared
between the Clevo PA70ES and the X+ piccolo series.

The piccolo's hwdb rule matches by input device ID
(evdev:input:b0011v0001p0001eAB83*) and remaps scan code 0x9c
(KP_Enter) to Enter, since the piccolo has no numpad and its
main Enter key sends the wrong scan code.

The Clevo PA70ES has a real numpad. The piccolo rule matches it
because both laptops use the same ITE controller firmware, which
breaks KP_Enter on the PA70ES.

Add a DMI-specific override that restores KEY_KPENTER for 0x9c
on the PA70ES.

The piccolo rule should ideally be narrowed to use DMI matching
instead of input device ID to avoid catching other laptops with
the same ITE controller firmware.