LinkStation: fix compiler warning, add a maintainer

out_8 wants a pointer to an unsigned as the first argument. Add a
maintainer for Linkstation boards.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>

MAINTAINERS

@@ -408,6 +408,10 @@ John Zhan <zhanz@sinovee.com>
 
 	svm_sc8xx		MPC8xx
 
+Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+
+	linkstation		MPC8241
+
 -------------------------------------------------------------------------
 
 Unknown / orphaned boards:

board/linkstation/hwctl.c

@@ -27,7 +27,7 @@
 /*--------------------------------------------------------------*/
 static inline void miconCntl_SendUart(unsigned char dat)
 {
-	out_8((char *)AVR_PORT, dat);
+	out_8((unsigned char *)AVR_PORT, dat);
 	mdelay(1);
 }