ARM: tegra: build new fuse driver in drivers/misc

ARM: tegra: build new fuse driver in drivers/misc

The Tegra fuse code has moved to drivers/misc/fuse/tegra. Enable the
building of that code, and disable the building of the old fuse code in
arch/arm/mach-tegra/. Also move the only user of tegra_revision over to
tegra_sku_info.revision and export tegra_fuse_readl to allow drivers to read
calibration fuses.

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>