vboot: deprecate ARM's VbGetVarGpio

This was originally used for some U-Boot devices which have
already reached AUE.

Keep gpiod_read (the current method), and VbGetPlatformGpioStatus
(deprecated, but still used in current devices).

TEST=make clean && make runtests

Change-Id: I2a7b97f2ead0294027407cb4e9349cc5265f8f82
Signed-off-by: Joel Kitching <kitching@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/1539434
Tested-by: Joel Kitching <kitching@chromium.org>
Commit-Queue: Joel Kitching <kitching@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
1 file changed