ixgbevf: make use of BIT() macro to avoid shift of signed values

ixgbevf: make use of BIT() macro to avoid shift of signed values

Orabug: 24568240

Also cleanup a case where we're bit shifting a value into place, and use
an unsigned constant. Make use of the unsigned postfix in places where
BIT() macro is not appropriate.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from commit 8d055cc0c8be92cd6a77193460117f0ab0a05286)
Signed-off-by: Brian Maly <brian.maly@oracle.com>