ice: Enable SW interrupt from FW for LL TS

Introduce new capability - Low Latency Timestamping with Interrupt.
On supported devices, driver can request a single timestamp from FW
without polling the register afterwards. Instead, FW can issue
a dedicated interrupt when the timestamp was read from the PHY register
and its value is available to read from the register.
This eliminates the need of bottom half scheduling, which results in
minimal delay for timestamping.

For this mode, allocate TS indices sequentially, so that timestamps are
always completed in FIFO manner.

Co-developed-by: Yochai Hagvi <[email protected]>
Signed-off-by: Yochai Hagvi <[email protected]>
Reviewed-by: Przemek Kitszel <[email protected]>
Signed-off-by: Karol Kolacinski <[email protected]>
Tested-by: Pucha Himasekhar Reddy <[email protected]> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <[email protected]>

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