powerpc, 83xx: add kmsupx5 board support

The Keymile SUPx5 board series is based on a PBEC8321 but
contains an additional PBUS FPGA (LPXF) on local bus CS2.

Signed-off-by: Thomas Reufer <thomas.reufer@keymile.com>
Signed-off-by: Heiko Schocher <hs@denx.de>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
cc: Wolfgang Denk <wd@denx.de>
cc: Kim Phillips <kim.phillips@freescale.com>
cc: Valentin Longchamp <valentin.longchamp@keymile.com>
cc: Holger Brunck <holger.brunck@keymile.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index e5d8611..e2a4ba9 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -427,6 +427,7 @@
 	ids8247		MPC8247
 	jupiter		MPC5200
 	kmeter1		MPC8360
+	kmsupx5		MPC8321
 	mgcoge		MPC8247
 	mgcoge2ne	MPC8247
 	mgcoge2un	ARM926EJS (Kirkwood SoC)