[CPUFREQ] Remove duplicate check in powernow-k8

Remove a duplicate NULL pointer check introduced by commit
4211a30349e8d2b724cfb4ce2584604f5e59c299

Signed-off-by: Tobias Klauser <tklauser@nuerscht.ch>
Signed-off-by: Dave Jones <davej@redhat.com>
1 file changed