cpuat91: fix board support

- fix board support following relocation changes
- switch to boards.cfg
- disable i2c to keep size under 128kiB (1 sector)

Signed-off-by: Eric BĂ©nard <eric@eukrea.com>
diff --git a/board/eukrea/cpuat91/Makefile b/board/eukrea/cpuat91/Makefile
index 15da3d8..1d62b13 100644
--- a/board/eukrea/cpuat91/Makefile
+++ b/board/eukrea/cpuat91/Makefile
@@ -25,7 +25,7 @@
 
 LIB	= $(obj)lib$(BOARD).o
 
-COBJS	:= cpuat91.o
+COBJS	:= $(BOARD).o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))
@@ -38,7 +38,7 @@
 	rm -f $(SOBJS) $(OBJS)
 
 distclean:	clean
-	rm -f $(LIB) core *.bak .depend
+	rm -f $(LIB) core *.bak $(obj).depend
 
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