arm: s5pv210: cpufreq: reduce arm internal voltage

  .target: use stable 1175 for p1 overclocked cpu frequencies
  .reference: get these values from old p1 gingerbread stable kernel (thanks @koxudaxi)
  .reason: saving battery life

Signed-off-by: Humberto Borba <humberos@gmail.com>
Signed-off-by: Koudai Aono <koxudaxi@gmail.com>