powerpc/ppc4xx: Use generic accessor functions for gdsys FPGA

A set of accessor functions was added to be able to access not only
memory mapped FPGA in a generic way.

Thanks to Wolfgang Denk for getting this sorted properly.

Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/board/gdsys/common/Makefile b/board/gdsys/common/Makefile
index 43e6a4c..60b1604 100644
--- a/board/gdsys/common/Makefile
+++ b/board/gdsys/common/Makefile
@@ -13,6 +13,8 @@
 
 LIB	= $(obj)lib$(VENDOR).o
 
+COBJS-$(CONFIG_SYS_FPGA_COMMON) += fpga.o
+
 COBJS-$(CONFIG_IO) += miiphybb.o
 COBJS-$(CONFIG_IO64) += miiphybb.o
 COBJS-$(CONFIG_IOCON) += osd.o