tegra: correct gpio_index_to_port() calculation

The gpio_index_to_port() incorrectly was dividing by
GPIO_PORTS_PER_BANK on a value including the bit number. After
masking off the BANK offset just divide by the number of gpios
in a port to get the port offset.

BUG=chrome-os-partner:29981
BRANCH=None
TEST=Built and ran through to depthcharge. Printed bank, port, and
     bit numbers for validation.

Change-Id: I3fbbb90f369bace90e787148a58795b7b1b40c1b
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 97e1f830b4a8e948673433bfa6d81586204b6ee2
Original-Change-Id: I8bb50e922c9fd7c0a1c247ba95394f6deb9f1533
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/210909
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: http://review.coreboot.org/8908
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

0 files changed, 0 insertions, 0 deletions