MIPS: math-emu: Turn macros into functions where possible.

arch/mips/math-emu/ieee754int.h

arch/mips/math-emu/ieee754sp.c

arch/mips/math-emu/ieee754sp.h

arch/mips/math-emu/sp_add.c

arch/mips/math-emu/sp_cmp.c

arch/mips/math-emu/sp_div.c

arch/mips/math-emu/sp_fdp.c

arch/mips/math-emu/sp_fint.c

arch/mips/math-emu/sp_flong.c

arch/mips/math-emu/sp_frexp.c

arch/mips/math-emu/sp_logb.c

arch/mips/math-emu/sp_modf.c

arch/mips/math-emu/sp_mul.c

arch/mips/math-emu/sp_scalb.c

arch/mips/math-emu/sp_simple.c

arch/mips/math-emu/sp_sqrt.c

arch/mips/math-emu/sp_sub.c

arch/mips/math-emu/sp_tint.c

arch/mips/math-emu/sp_tlong.c