WiFi: Vendor HAL function to wait for driver ready

This commit adds a vendor hal function to wait for the driver to be
ready. This ensures the driver is ready for operatin before framework
starts to use it

Bug: 73482286
Test: Manual test (reboot and make sure wifi comes up consistently)
Test: The reboot test has been performed more than 10 times in a row
Test: Also, tested toggling wifi off/on then rebooted, wifi starts fine

Change-Id: I31bc594525762454b0c2f491486ffe575843c858
Signed-off-by: Ahmed ElArabawy <arabawy@google.com>
1 file changed