Add Multiplier option and New FPU option

Signed-off-by: Yunlu Zhang <Yunlu.Zhang@synopsys.com>

20:56:57 **** Build of configuration Debug for project hic ****
make all
Building file: ../src/crt0.S
Invoking: ARC Linux ELF32 GCC Assembler
arc-elf32-gcc -x assembler-with-cpp -Wall -Wa,-adhlns="src/crt0.o.lst" -c -fmessage-length=0 -MMD -MP -MF"src/crt0.d" -MT"src/crt0.d" -mcpu=ARCv2EM -mlittle-endian -mfpu=fpus -mmpy_option=1 -g3 -gdwarf-2 -o "src/crt0.o" "../src/crt0.S"
arc-elf32-gcc: error: unrecognized command line option -mfpu=fpus
make: *** [src/crt0.o] Error 1
1:-mmpy_option works
2:-mfpu unrecognized
3: haven't done those two option optional depending on the core type