powerpc: fix invalid use of register expressions

[Michael Ellerman]

On Sat, 2017-08-05 at 17:55:11 UTC, Andreas Schwab wrote:
> binutils >= 2.26 now warns about misuse of register expressions in
> assembler operands that are actually literals, for example:
> 
> arch/powerpc/kernel/entry_64.S:535: Warning: invalid register expression
> 
> Signed-off-by: Andreas Schwab <schwab at linux-m68k.org>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/8a583c0a8d316d8ea52ea78491174a

cheers