wlan: Store avoid channel list

Store avoid channel list into recoverable location.
If Softap mode detects current channel is not safe to use,
WLAN kernel module will be restarted.
Then WLAN kernel module internal storage will lost
unsafe channel information.
To avoid start softap with unsafe channel, channel information
should be stored in static location.

Change-Id: I5a6d7ab7314936d7bbaaf7a005e58179a4dc0613
CRs-fixed: 576020
Signed-off-by: Leo Chang <leochang@codeaurora.org>
wcnss: Log debug registers when receives certain notification

If powering on a subsystem during restart fails, SSR framework will send
a "powerup failure" notification to the subsystem. Add support that
WCNSS platform driver will register to listen the notifications and if
receives "powerup failure" notification, it will log the debug registers.

Change-Id: I0ae8a5ee96122d71c7a86711044f6b07e400b62c
Signed-off-by: Yue Ma <yuem@codeaurora.org>
[smihir@codeaurora.org: removed powerup failure notification for riva]
Signed-off-by: Mihir Shete <smihir@codeaurora.org>
wcnss: add API to check if wcnss is undergoing an SSR

Wlan driver should not read registers from wcnss or
try to communicate with the chip when it is undergoing
a subsystem-restart. Added an API with the wcnss platform
driver to check if ssr is in progress, this API will be
used by the wlan driver to protect register access and
other prohibited operations.

Change-Id: Ia0d93e774af126d84dbaabf5c36a2c90fdbd58be
CRs-Fixed: 621974
Signed-off-by: Mihir Shete <smihir@codeaurora.org>