MIPS: COP2: CPP macro safety fixes.

 - Don't pass things to macros that couldn't be dereferences if that
   macro was actually a function.
 - Don't use empty function-like macros.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --cc arch/mips/include/asm/cop2.h
Simple merge

diff --cc arch/mips/include/asm/switch_to.h
Simple merge