rename some ifxmips files

SVN-Revision: 11603

target/linux/ifxmips/files/arch/mips/ifxmips/Makefile

@@ -1 +1 @@
-obj-y := reset.o prom.o setup.o interrupt.o dma-core.o pmu.o board.o cgu.o gptu.o gpio.o
+obj-y := reset.o prom.o setup.o interrupt.o dma-core.o pmu.o board.o clock.o timer.o gpio.o