first commit, spifi library (from lpcware) added. Linker script do not let U-Boot run elsewhere than in SPIFI (mapped at 0x14000000 on LPC4350). SPIFI isn't recognized using CFI yet because command return hard fault : library is going to be used instead for init and command available in U-Boot. The goal is to execute U-Boot from SPI flash only and use only this flash after rellocating.