vboot: stop reading from ACPI for wpsw_boot

Stop reading wpsw_boot value from ACPI as fallback for
wpsw_cur.  wpsw_cur is available on all non-EOL'd devices.

BUG=b:124141368, chromium:950273, chromium:1059670
TEST=make clean && make runtests
BRANCH=none

Change-Id: I9c6f21b9f341a61e85db3e6e45b553b1ab4293e3
Signed-off-by: Joel Kitching <kitching@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/2094807
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: Joel Kitching <kitching@chromium.org>
Commit-Queue: Joel Kitching <kitching@chromium.org>
1 file changed