NVIDIA Tegra20/Tegra30/Tegr114/Tegra124 apbmisc block

Required properties:
- compatible : For Tegra20, must be "nvidia,tegra20-apbmisc".  For Tegra30,
  must be "nvidia,tegra30-apbmisc".  Otherwise, must contain
  "nvidia,<chip>-apbmisc", plus one of the above, where <chip> is tegra114,
  tegra124, tegra132.
- reg: Should contain 2 entries: the first entry gives the physical address
       and length of the registers which contain revision and debug features.
       The second entry gives the physical address and length of the
       registers indicating the strapping options.