powerpc: inka4x0: convert to generic board

Also update maintainer info.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
diff --git a/board/inka4x0/MAINTAINERS b/board/inka4x0/MAINTAINERS
index 246b2d4..e8cec73 100644
--- a/board/inka4x0/MAINTAINERS
+++ b/board/inka4x0/MAINTAINERS
@@ -1,5 +1,5 @@
 INKA4X0 BOARD
-M:	Detlev Zundel <dzu@denx.de>
+M:	Anatolij Gustschin <agust@denx.de>
 S:	Maintained
 F:	board/inka4x0/
 F:	include/configs/inka4x0.h