ifxmips: fold files/drivers/* into patches

target/linux/ifxmips/config-2.6.30

target/linux/ifxmips/files/drivers/leds/leds-ifxmips.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

target/linux/ifxmips/files/drivers/watchdog/ifxmips_wdt.c

target/linux/ifxmips/patches-2.6.30/120-serial.patch

target/linux/ifxmips/patches-2.6.30/130-ethernet.patch

target/linux/ifxmips/patches-2.6.30/140-mtd.patch

target/linux/ifxmips/patches-2.6.30/150-wdt.patch

target/linux/ifxmips/patches-2.6.30/160-led.patch