ice: Renaming and simplification in VF init path

Some function names weren't very clear and some portions of VF creation
could be moved into functions for clarity. Fix this by renaming some
functions and move pieces of code into clearly name functions.

Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>