Pull Wi-Fi management APIs for PS exit strategy configuration support.

Signed-off-by: Ajay Parida <ajay.parida@nordicsemi.no>
Signed-off-by: Chaitanya Tata <Chaitanya.Tata@nordicsemi.no>

Dynamically set power save exit strategy runtime configuration that
allows to switch b/w stratgies depending on conserving power and
low-latency traffic download.

Signed-off-by: Ajay Parida <ajay.parida@nordicsemi.no>
Signed-off-by: Chaitanya Tata <Chaitanya.Tata@nordicsemi.no>

This helps in fixing recovery issues in case of heavy management
traffic.

Signed-off-by: Ajay Parida <ajay.parida@nordicsemi.no>

UMAC:
    [SHEL-3044]: Run time API support to enable QOS null frame
                 based power save.

Signed-off-by: Karun Kumar Eagalapati <karun.kumar@nordicsemi.no>

The logic in the firmware is about exiting power save, the data
retrieval itself is pretty standardized.

Signed-off-by: Chaitanya Tata <Chaitanya.Tata@nordicsemi.no>

UMAC:
[SHEL-3044]: Run time API support to enable QOS null frame
             based power save.

Signed-off-by: Srinivasaraju Chintalapati <srinivasaraju.chintalapati@nordicsemi.no>

In some scenarios like reading WDOG status, it was observed that
multiple retries are needed for the (Q)SPI read to be successful, so,
add a retry support.

Signed-off-by: Chaitanya Tata <Chaitanya.Tata@nordicsemi.no>

It was assumed that RPU would stay awake while servicing an interrupt,
but in few scenarios we had seen RPU entering sleep with a pending
interrupt, so, independent of the state (IRQ or not), wakeup RPU if its
asleep.

Signed-off-by: Chaitanya Tata <Chaitanya.Tata@nordicsemi.no>

Ideally we should be using Zephyr spinlock APIs but that requires
changes to shim API, so, for this maintenance release just replace with
mutex to keep the context same and no API changes.

This solves the locking issue that we see when control and data path are
excited concurrently due to locking semantics of semaphores, the issue
is not root caused but mutex enforce strict locking semantics for
multiple threads and solve the issue.

Signed-off-by: Chaitanya Tata <Chaitanya.Tata@nordicsemi.no>

*[SHEL-2694] : Power save enabled behavior with wmm mode.
*Checking IRQ status before entering sleep mode upon
 receiving the sleep event from LMAC.

Signed-off-by: Karun Kumar Eagalapati <karun.kumar@nordicsemi.no>