s5pv210:  CPU voltage control

Based on two patches from netarchy, converted to work with a non-overclocked Player 5.0:
https://github.com/netarchy/infuse4g-sources/commit/bc3aecfc66d69349d149824ac9ac62a15462c74e
https://github.com/netarchy/infuse4g-sources/commit/d9cf31936f59c5214af8feb51b04990da1f8c74a
Overclock for Galaxy Player 5.0 - Add 1.2 GHz

Based on various overclock patches by netarchy:
https://github.com/netarchy/infuse4g-sources/commit/496856666e8d0f1c3559b7528af93623dac12185
https://github.com/netarchy/infuse4g-sources/commit/80ba6d6d7b1a1628eed7501b3fbb6806694b6094
https://github.com/netarchy/infuse4g-sources/commit/bdf9edeaa0aab69415f54633ea01ae7836c6f95b

In addition, all DVFS locks I could find were corrected in their levels so the frequencies
don't bump up - a lot of people miss this one including netarchy.

Signed-off-by: Andrew Dodd <atd7@cornell.edu>