This patch will add support for 32 bit atomic request descriptor for Aero adapters.

For Aero adapters-

1. Driver will use 32 bit atomic descriptor to fire IOs and DCMDs.
2. Driver will use 64 bit request descriptor to fire IOC INIT.
3. If Aero firmware supports 32 bit atomic descriptor, then only driver will use it

otherwise driver will use 64 bit request descriptor.

For rest of adapters(Ventura, Invader and Thunderbolt), driver will use 64 bit request
descriptors only.

Submitted by: Sumit Saxena <sumit.saxena@broadcom.com>
Reviewed by: Kashyap Desai <Kashyap.Desai@broadcom.com>
Approved by: ken
MFC after: 3 days
Sponsored by: Broadcom Inc