[PATCH] Fix for the 4-operand mtfsf instruction use in *context functions (powerpc)

[Carlos Eduardo Seo]

Hello

A recent change added

.machine push
.machine "power6"
<mtfsf usage>
.machine pop

guard around the usage of a 4 operand mtfsf instruction in
set/swapcontext functions for Power when _ARCH_PWR6 is not defined

I noticed that we also need these when _ARCH_PWR6 is defined, since it
doesn't define .machine "power6", otherwise the build will fail. The
attached patch fixes this.

Tested this building glibc with --with-cpu=power6 in a POWER6 system.

Comments?

-- 
Carlos Eduardo Seo
Software Engineer
IBM Linux Technology Center
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