BugLink: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1753438
BugLink: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1753439

As in coex mode radio will be shared between BT and WLAN,
we need enable deep sleep before scan. Before scan deep
sleep can be disabled and re-enabed after scan. For any TX
frame before assoc, deep sleep shall be disable.
Signed-off-by: Sanjay Kumar Konduri <sanjay.konduri@redpinesignals.com>
Signed-off-by: Amitkumar Karwar <amit.karwar@redpinesignals.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Shrirang Bagul <shrirang.bagul@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>