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Enforce full include path for includes. Deprecate old paths.

The following folders inside include/lib have been left unchanged:

- include/lib/cpus/${ARCH}
- include/lib/el3_runtime/${ARCH}

The reason for this change is that having a global namespace for
includes isn't a good idea. It defeats one of the advantages of having
folders and it introduces problems that are sometimes subtle (because
you may not know the header you are actually including if there are two
of them).

For example, this patch had to be created because two headers were
called the same way: e0ea0928 ("Fix gpio includes of mt8173 platform
to avoid collision."). More recently, this patch has had similar
problems: 46f9b2c3 ("drivers: add tzc380 support").

This problem was introduced in commit 4ecca339

 ("Move include and
source files to logical locations"). At that time, there weren't too
many headers so it wasn't a real issue. However, time has shown that
this creates problems.

Platforms that want to preserve the way they include headers may add the
removed paths to PLAT_INCLUDES, but this is discouraged.

Change-Id: I39dc53ed98f9e297a5966e723d1936d6ccf2fc8f
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

Register a priority level, PLAT_SP_PRI, for secure partition with EL3
exception handling framework(ehf) module.

The secure partition manager(SPM) would raise the core's priority to
PLAT_SP_PRI before entering the secure partition, to protect the core
from getting interrupted while in secure partition.

Change-Id: I686897f052a4371e0efa9b929c07d3ad77249e95
Signed-off-by: Sughosh Ganu <sughosh.ganu@arm.com>

  - Assign 0x10 for RAS exceptions on ARM platforms, and install
    EHF priority descriptor.

  - Call the common RAS initialisation from ARM BL31 setup.

  - Add empty definitions for platform error records and RAS interrupts.

Change-Id: I0675f299b7840be4c83a9c7a81073a95c605dc90
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>

Define number of priority bits, and allocate priority levels for SDEI.

Change-Id: Ib6bb6c5c09397f7caef950c4caed5a737b3d4112
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>