Allow swi instruction for ARC700. Tackle negative auxregister values.
Fix reporting the name of the architecture
        * elf32-arc.c (elf_arc_check_relocs): Don't worry about relocs in pie.
Enable ldb without destination register to be used as a prefetch instruction
Increase compatibility with metaware tools
Enable single precision FPU ops for EM
 Check if 5bit 'h' register class is correctly used