All Tegra SoCs have a freerunning microsecond counter which can be used as a
delay timer.
Signed-off-by: NPeter De Schrijver <pdeschrijver@nvidia.com>
Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NStephen Warren <swarren@nvidia.com>