make wifi_load_driver blocking

Modify wifi_load_driver behavior synchronize startHal with the initialization
of the wlan driver.  This makes sure that on certain solutions, startHal will
does not fail due to no wlan0 net device not being found.

Bug:19888853

Change-Id: Ic6ec2211431c478e52eb516c40ec23c2e8945fbb
Signed-off-by: Maddest Chang <maddest.chang@mediatek.com>
Signed-off-by: Iliyan Malchev <malchev@google.com>
2 files changed