ixgbe: bump version number

Move the version string to better reflect the driver functionality with
that of the out of tree driver.  Also since we no longer need the MAJ,
MIN, BUILD defines remove them to clean up the code.

Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>