[POWERPC] Use a sensible default for clock_getres() in the VDSO

This ensures that the syscall and the (fast) vdso versions of
clock_getres() will return the same resolution.

Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
1 file changed