Add plat-vexpress

* Initial support for Versatile Express of FVP with ARM Trusted
Firmware (ATF below)

* Use entry vector for entering TEE

Align interface between TEE and secure monitor with t

Add plat-vexpress

* Initial support for Versatile Express of FVP with ARM Trusted
Firmware (ATF below)

* Use entry vector for entering TEE

Align interface between TEE and secure monitor with the interface
between OPTEED in ATF and TEE.

Uses an ATF compatible entry vector for entering TEE from internal
secure monitor.

Internal secure monitor saves entry reason to be able to tell when
switching back to nonsecure world if r0-r3 should be preserved (FIQ case)
or returned as is (normal call case).

* Many small fixes of generic problems that could affect other platforms
too.

* Disable unaligned data accesses by adding compiler flag
-mno-unaligned-access

* Adds support for Versatile Express of QEMU with 8 MiB of secure DRAM

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Fix compilation issue when there is no traces

Removed file core/include/kernel/kta_mem.h

Signed-off-by: Joakim Bech <joakim.bech@linaro.org>

Removed unused KTA related defines

- Moved IO macro from kta_mem.h to io.h.
- Removed unused TEE_MEM_xyz defines.
- Removed code that was used for TA's in TEE RAM (impossible to reach
that code).

Removed unused KTA related defines

- Moved IO macro from kta_mem.h to io.h.
- Removed unused TEE_MEM_xyz defines.
- Removed code that was used for TA's in TEE RAM (impossible to reach
that code).

Signed-off-by: Joakim Bech <joakim.bech@linaro.org>

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Open-source the TEE Core

Signed-off-by: Pascal Brand <pascal.brand@st.com>