ixgbe: remove whitespace in function comments

ixgbe: remove whitespace in function comments

Remove unnecessary extra whitespace on all function comments, replacing
' *  ' with ' * '.

This was done automatically via sed using the following transformation:

  sed 's/^ \*  / * /'

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Guinan Sun <guinanx.sun@intel.com>
Reviewed-by: Wei Zhao <wei.zhao1@intel.com>
Approved by:	imp
Obtained from:	DPDK (40023f73c76579e58a859dab87b4c30278eb2e48)
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D31621

(cherry picked from commit 4cdc5e12a849871e4e8062a62a31f28545901d84)