Some Intel controllers (e.g. BXT) might fail to set bus power after a
D3 -> D0 transition due to the present state not yet having propagated.
Retry for up to 2 milliseconds.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>