ACPI: EC: Don't do transaction from GPE handler in poll mode.

commit 8517934e upstream.

Referencies: http://bugzilla.kernel.org/show_bug.cgi?id=12004



Signed-off-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>