lenovo/t520/gpio.h: Fix current gpio configuration

Change-Id: I67f321583211efd9ed917276cc3989c6dc4ac649
Signed-off-by: Nicolas Reinecke <nr@das-labor.org>
Reviewed-on: http://review.coreboot.org/6848
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Tested-by: build bot (Jenkins)
1 file changed