MPC8xxx: Update maintainer entry for Wind River sbc8xxx boards

I've probably got the best chance of getting access to these
boards in order to test things, and since Joe's e-mail is
bouncing, update the MAINTAINERS entry to reflect this.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

MAINTAINERS

@@ -198,6 +198,14 @@ Siddarth Gore <gores@marvell.com>
 
 	guruplug	ARM926EJS (Kirkwood SoC)
 
+Paul Gortmaker <paul.gortmaker@windriver.com>
+
+	sbc8349		MPC8349
+	sbc8540		MPC8540
+	sbc8548		MPC8548
+	sbc8560		MPC8560
+	sbc8641d	MPC8641D
+
 Frank Gottschling <fgottschling@eltec.de>
 
 	MHPC		MPC8xx
@@ -212,11 +220,6 @@ Wolfgang Grandegger <wg@denx.de>
 	IPHASE4539	MPC8260
 	SCM		MPC8260
 
-Joe Hamman <joe.hamman@embeddedspecialties.com>
-
-	sbc8548		MPC8548
-	sbc8641d	MPC8641D
-
 Klaus Heydeck <heydeck@kieback-peter.de>
 
 	KUP4K		MPC855