Add MIPS specific image_info struct fields fp_abi and interp_fp_abi
to store executable and interpreter fp_abi values (based on kernel
struct arch_elf_state in mips/include/asm/elf.h).
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Signed-off-by: Stefan Markovic <smarkovic@wavecomp.com>