gen: omap: Add timer_get_us to OMAP boards

BUG=none
TEST=Build u-boot for Beaglebone, compiles/boots
BRANCH=none

Change-Id: I6d24bdf0b1d002f2ccae2fbf68ae36a166a50dc1
Signed-off-by: Liam McLoughlin <lmcloughlin@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/56497
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
1 file changed