Optimize slub
tegra3_variant: add debugfs entry to display real tegra3 SOC
 variant info

Signed-off-by: Paul Reioux <reioux@gmail.com>

Conflicts:

	arch/arm/mach-tegra/Kconfig
	arch/arm/mach-tegra/tegra3_speedo.c

Conflicts:
	arch/arm/mach-tegra/edp.c