iomap.h defines the base address of Tegra peripherals. Most of this
information comes from device tree now, and hence can be deleted.
Entries are kept for various system peripherals that low-level code
(such as initial boot, system suspend/resume, debug) still requires.

Removing the values removes the temptation for someone to use them.
Signed-off-by: Stephen Warren <swarren@nvidia.com>