net/ice: factorize firmware loading

net/ice: factorize firmware loading

Both "normal" and "dcf" inits have their copy of some firmware loading
code.

The DSN query is moved in specific parts for the "normal" and "dcf" init.

A common helper ice_load_pkg is then introduced and takes an adapter
pointer as its main input.

This helper takes care of finding the right firmware file and loading
it.
The adapter active_pkg_type field is set by this helper.

The ice_access macro is removed from the osdep.h header: osdep.h should
only hosts wrappers for base driver code.

Signed-off-by: David Marchand <david.marchand@redhat.com>
Acked-by: Haiyue Wang <haiyue.wang@intel.com>