[POWERPC] Minor comment fix for misc_64.S
A minor comment fix for misc_64.S from Takao Shinohara.
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
authored by Geoff Levand and committed by Paul Mackerras 8d950cb8 9b9b72fe