Added primary and secondary bootloaders

target/linux/at91-2.6/image/Config.in

target/linux/at91-2.6/image/Makefile

target/linux/at91-2.6/image/romboot/Makefile

target/linux/at91-2.6/image/romboot/patches/000-fixenv.patch

...t/linux/at91-2.6/image/romboot/patches/001-makefile.patch

target/linux/at91-2.6/image/u-boot/Makefile

...x/at91-2.6/image/u-boot/patches/001-lowlevel-config.patch

...at91-2.6/image/u-boot/patches/002-dataflash_machine.patch

...et/linux/at91-2.6/image/u-boot/patches/003-mac_init.patch

.../linux/at91-2.6/image/u-boot/patches/004-mac_config.patch

...inux/at91-2.6/image/u-boot/patches/005-remove_float.patch