[CPUFREQ] Fix typos in powernow-k8 printk's.

Based on a patch from Joachim which didn't apply, so I fixed
it up by hand, and also corrected the surrounding indentation
a little.

Signed-off-by: Joachim.Deguara <joachim.deguara@amd.com>
Acked-by: Mark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: Dave Jones <davej@redhat.com>