feat(versal): introduce platform support

Introduce platform support for AMD-Xilinx Versal, an adaptive compute
acceleration platform (ACAP).
- pl011 is used for console.
- TTC is used for Timers.
- NVM is not supported.

Watchdog timer support to come in another change

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Tests Skipped : 172
Tests Passed  : 38
Tests Failed  : 5
Tests Crashed : 0
Total tests   : 215
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Signed-off-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Akshay Belsare <akshay.belsare@amd.com>
Change-Id: If358a8018f4106d2267b6bed8eadbfdbaa48ad39
7 files changed