Use same string functions for all MIPS architectures.
Bug: 21555893
(cherry picked from commit 38f2eaa07b0ad2e01a40607d3a0ac240ff53abbf)
Change-Id: I94521f023d0bb136a4672782148a9f6e77cc6f1e
Our <machine/asm.h> files were modified from upstream, to the extent
that no architecture was actually using the upstream ENTRY or END macros,
assuming that architecture even had such a macro upstream. This patch moves
everyone to the same macros, with just a few tweaks remaining in the
<machine/asm.h> files, which no one should now use directly.
I've removed most of the unused cruft from the <machine/asm.h> files, though
there's still rather a lot in the mips/mips64 ones.
Bug: 12229603
Change-Id: I2fff287dc571ac1087abe9070362fb9420d85d6d