MAINTAINERS: Update Intel Wired LAN reviewers

Since Matthew has moved on to other pastures and no longer works
for Intel, remove him from the list of reviewers and add Bruce
Allan as his replacement.

CC: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

MAINTAINERS

@@ -5574,7 +5574,7 @@ R:	Jesse Brandeburg <jesse.brandeburg@intel.com>
 R:	Shannon Nelson <shannon.nelson@intel.com>
 R:	Carolyn Wyborny <carolyn.wyborny@intel.com>
 R:	Don Skidmore <donald.c.skidmore@intel.com>
-R:	Matthew Vick <matthew.vick@intel.com>
+R:	Bruce Allan <bruce.w.allan@intel.com>
 R:	John Ronciak <john.ronciak@intel.com>
 R:	Mitch Williams <mitch.a.williams@intel.com>
 L:	intel-wired-lan@lists.osuosl.org