ACPI: EC: make kernel messages more useful when GPE storm is detected

commit f8248434e6a11d7cd314281be3b39bbcf82fc243 upstream.

Make sure we can tell if the GPE storm workaround gets activated,
and avoid flooding the logs afterwards.

http://bugzilla.kernel.org/show_bug.cgi?id=11841
"plenty of line "ACPI: EC: non-query interrupt received,
 switching to interrupt mode" in dmesg"

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Acked-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>