[Patch, MIPS] Modify dl-machine.h for mips32r6/mips64r6

[Matthew Fortune]

> diff --git a/sysdeps/mips/dl-machine.h b/sysdeps/mips/dl-machine.h
> index 5000d2a..8885c80 100644
> --- a/sysdeps/mips/dl-machine.h
> +++ b/sysdeps/mips/dl-machine.h
> @@ -138,7 +138,11 @@ elf_machine_load_address (void)
>  #ifndef __mips16
>    asm ("	.set noreorder\n"
>         "	" STRINGXP (PTR_LA) " %0, 0f\n"
> +#if __mips_isa_rev < 6
>         "	bltzal $0, 0f\n"
> +#else
> +       "	bal 0f\n"
> +#endif
>         "	nop\n"
>         "0:	" STRINGXP (PTR_SUBU) " %0, $31, %0\n"
>         "	.set reorder\n"

I never got to reviewing this internally.  We should switch this to using
ADDIUPC.

The goal of this code I believe is to determine the relative offset from the
static and dynamic locations of ld.so.

	" STRINGXP (PTR_LA) " %0, 0f\n"
0: addiupc <reg>, 0
" STRINGXP (PTR_SUBU) " %0, <reg>, %0\n"

We should also do something similar with the other case.

Thanks,
Matthew