Add s/dpfp-fast and rename other FPX options

12:49:47 **** Build of configuration Debug for project hiem ****
make all
Building file: ../src/crt0.S
Invoking: ARC 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 -mmpy_option=2 -g3 -gdwarf-2 -mspfp-fast -mdpfp-fast -o "src/crt0.o" "../src/crt0.S"
Finished building: ../src/crt0.S

Building file: ../src/hiem.c
Invoking: ARC ELF32 GCC C Compiler
arc-elf32-gcc -O0 -Wall -Wa,-adhlns="src/hiem.o.lst" -c -fmessage-length=0 -MMD -MP -MF"src/hiem.d" -MT"src/hiem.d" -mcpu=ARCv2EM -mlittle-endian -mmpy_option=2 -g3 -gdwarf-2 -mspfp-fast -mdpfp-fast -o "src/hiem.o" "../src/hiem.c"
Finished building: ../src/hiem.c

Building target: hiem.elf
Invoking: ARC ELF32 GCC C Linker
arc-elf32-gcc -Wl,-Map,hiem.map -mcpu=ARCv2EM -mlittle-endian -mmpy_option=2 -g3 -gdwarf-2 -mspfp-fast -mdpfp-fast -o "hiem.elf"  ./src/crt0.o ./src/hiem.o
./src/crt0.o: In function `__start':
C:\Users\yunluz\runtime-EclipseApplication\hiem\Debug/crt0.S:47: multiple definition of `__start'
c:/arc48/bin/../lib/gcc/arc-elf32/4.8.0/../../../../arc-elf32/lib/em/crt0.o:/bld/arc/unisrc-4.8win/newlib/libc/sys/arc/crt0.S:79: first defined here
./src/crt0.o: In function `_exit_halt':
C:\Users\yunluz\runtime-EclipseApplication\hiem\Debug/crt0.S:133: multiple definition of `_exit_halt'
c:/arc48/bin/../lib/gcc/arc-elf32/4.8.0/../../../../arc-elf32/lib/em/crt0.o:/bld/arc/unisrc-4.8win/newlib/libc/sys/arc/crt0.S:153: first defined here
collect2.exe: error: ld returned 1 exit status
C:\CYGWIN\HOME\MAIN\DEV\MYRELEASE\BIN\WIN32\make.exe: *** [hiem.elf] Error 1

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