sync.c: add a module_param to fsync() calls. fsync is still disabled by default but users will have the choice of having a faster build or a safer build (for data integrity)

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
cpu-tegra.c: cpu freq transition latency is huge, decrease to 30ms

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
cpufreq.c: add userspace voltage control. Original implementation from faux123 (which was based on Michael Huang's OMAP4460 work). Interface cleaned up, made more robust and secure.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
tegra: add GPU overclock interface.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
First commit