[CPUFREQ] Typo in powernow-k8

(Also fix some horked indentation)
Signed-off-by: Dave Jones <davej@redhat.com>

arch/i386/kernel/cpu/cpufreq/powernow-k8.c

@@ -20,7 +20,7 @@
  *  of the "BIOS and Kernel Developer's Guide for the AMD Athlon 64 and AMD
  *  Opteron Processors" available for download from www.amd.com
  *
- *  Tables for specific CPUs can be infrerred from
+ *  Tables for specific CPUs can be inferred from
  *     http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/30430.pdf
  */