ACPICA: events/evgpeinit: don't forget to increment registered GPE count

ACPICA commit ba8a36b5c7343cb56af6b331362e97b25e898eb2

This was used to log the number of newly discovered GPEs post table
load in acpi_ev_update_gpes(), but we never incremented the number inside
acpi_ev_match_gpe_method(), so that was never logged.

Link: https://github.com/acpica/acpica/commit/ba8a36b5


Signed-off-by: Daniil Tatianin <99danilt@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>