lots of code cleanup for ifxmips

target/linux/ifxmips/files/arch/mips/ifxmips/board.c

target/linux/ifxmips/files/arch/mips/ifxmips/cgu.c

target/linux/ifxmips/files/arch/mips/ifxmips/dma-core.c

target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c

target/linux/ifxmips/files/arch/mips/ifxmips/gptu.c

target/linux/ifxmips/files/arch/mips/ifxmips/interrupt.c

target/linux/ifxmips/files/arch/mips/ifxmips/pmu.c

target/linux/ifxmips/files/arch/mips/ifxmips/prom.c

target/linux/ifxmips/files/arch/mips/ifxmips/reset.c

target/linux/ifxmips/files/arch/mips/ifxmips/setup.c

target/linux/ifxmips/files/drivers/char/ifxmips_ssc.c

target/linux/ifxmips/files/drivers/mtd/maps/ifxmips.c

target/linux/ifxmips/files/drivers/net/ifxmips_mii0.c

target/linux/ifxmips/files/drivers/serial/ifxmips_asc.c

...inux/ifxmips/files/include/asm-mips/ifxmips/ifxmips_irq.h

...fxmips/files/include/asm-mips/ifxmips/ifxmips_mei_linux.h

...nux/ifxmips/files/include/asm-mips/ifxmips/ifxmips_mii0.h