K 10
svn:author
V 8
jhibbits
K 8
svn:date
V 27
2019-01-13T04:51:24.373687Z
K 7
svn:log
V 357
powerpcspe: Correct SPE high-component loading

Don't clobber the low part of the register restoring the high component of.
This could lead to very bad behavior if it's an ABI-affected register.

While here, also mark the asm volatile in the SPE high save case, to match
the load case.

Reported by:	Branden Bergren (git_bdragon.rtk0.net)
MFC after:	1 week

END