remove 2.6.25 specific stuff

package/kernel/modules/other.mk

target/linux/adm5120/Makefile

target/linux/adm5120/files/arch/mips/adm5120/Kconfig

target/linux/adm5120/files/arch/mips/adm5120/Makefile

target/linux/adm5120/files/arch/mips/adm5120/adm5120_info.c

target/linux/adm5120/files/arch/mips/adm5120/board.c

target/linux/adm5120/files/arch/mips/adm5120/boards/Makefile

...linux/adm5120/files/arch/mips/adm5120/boards/cellvision.c

target/linux/adm5120/files/arch/mips/adm5120/boards/compex.c

target/linux/adm5120/files/arch/mips/adm5120/boards/edimax.c

...et/linux/adm5120/files/arch/mips/adm5120/boards/generic.c

...t/linux/adm5120/files/arch/mips/adm5120/boards/infineon.c

...t/linux/adm5120/files/arch/mips/adm5120/boards/mikrotik.c

target/linux/adm5120/files/arch/mips/adm5120/boards/zyxel.c

target/linux/adm5120/files/arch/mips/adm5120/clock.c

target/linux/adm5120/files/arch/mips/adm5120/gpio.c

target/linux/adm5120/files/arch/mips/adm5120/irq.c

target/linux/adm5120/files/arch/mips/adm5120/memory.c

target/linux/adm5120/files/arch/mips/adm5120/platform.c

target/linux/adm5120/files/arch/mips/adm5120/prom.c