kirkwood: drop 3.3.x kernel version

target/linux/kirkwood/config-3.3

...kwood/files-3.3/arch/arm/mach-kirkwood/goflexhome-setup.c

...rkwood/files-3.3/arch/arm/mach-kirkwood/goflexnet-setup.c

...irkwood/files-3.3/arch/arm/mach-kirkwood/iconnect-setup.c

...kirkwood/files-3.3/arch/arm/mach-kirkwood/nas6210-setup.c

...kirkwood/files-3.3/arch/arm/mach-kirkwood/nsa-310-setup.c

target/linux/kirkwood/patches-3.3/000-boards.patch

target/linux/kirkwood/patches-3.3/001-partition_map.patch

target/linux/kirkwood/patches-3.3/002-mvsdio_delay.patch