net/bnxt: support FW reset

net/bnxt: support FW reset

Added code to perform FW_RESET. When the driver detects error in FW,
it has to initiate the recovery by resetting the cores. FW advertise
the method to do a core reset, reset register offsets and values
to perform reset in response of HWRM_ERROR_RECOVERY_QCFG command.

There are 2 ways to recover from the error.
1. Master function issues core resets to recover from error.
2. Master function detects chimp dead condition and notify the Kong
   processor about the chimp dead case through FW_RESET HWRM command.
   Kong Processor send an RESET_NOTIFY async event with
   REASON_CODE_FW_EXCEPTION_FATAL to all the PF’s/VF’s that
   chimp is dead and it is going to reset the chimp.

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>