refactor(ti): introduce ti_bl31_setup

There maybe a lot of reuse between platforms for bl31_setup in future
which may require us to have a common bl31 setup driver for TI.
The ti_bl31_setup is expected to contain all the reusable bits
and the soc_bl31_setup can have the custom soc init functionality
like the mmap regions and any special sequences needed at
device boot
While at it, also fix the path of the reference to the kernel doc
for booting.

Change-Id: Ie574f08cf3ba75362c45f85306499061ef89c964
Signed-off-by: Dhruva Gole <d-gole@ti.com>
4 files changed