mach-tegra: tegra_mpdecision: redesign locking in gmode_notifier

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
mach-tegra: tegra_mpdecision: add max/min cpu limits to sysfs

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
mach-tegra: platsmp: this is only executed when the cpu is brought online, hence we don't need mpdecision here

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>