feat(psci): make pabandon support generic

Support for aborted powerdowns does not require much dedicated code.
Rather, it is largely a matter of orchestrating things to happen in the
right order.

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feat(psci): make pabandon support generic

Support for aborted powerdowns does not require much dedicated code.
Rather, it is largely a matter of orchestrating things to happen in the
right order.

The only exception to this are older secure world dispatchers, which
assume that a CPU_SUSPEND call will be terminal and therefore can
clobber context. This was patched over in common code and hidden behind
a flag. This patch moves this to the dispatchers themselves.

Dispatchers that don't register svc_suspend{_finish} are unaffected.
Those that do must save the NS context before clobbering it and
restoring in only in case of a pabandon. Due to this operation being
non-trivial, this patch makes the assumption that these dispatchers will
only be present on hardware that does not support pabandon and therefore
does not add any contexting for them. In case this assumption ever
changes, asserts are added that should alert us of this change.

Change-Id: I94a907515b782b4d2136c0d274246cfe1d567c0e
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>

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feat(trusty): switch to simd_ctx_save/restore apis

Change-Id: Ifa72334c4793965c23a20d31ff6dff258f72ddcb
Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>

refactor(cm): convert el1-ctx assembly offset entries to c structure

Currently the EL1 part of the context structure (el1_sysregs_t),
is coupled with feature flags reducing the context memory alloca

refactor(cm): convert el1-ctx assembly offset entries to c structure

Currently the EL1 part of the context structure (el1_sysregs_t),
is coupled with feature flags reducing the context memory allocation
for platforms, that don't enable/support all the architectural
features at once.

Similar to the el2 context optimization commit-"d6af234" this patch
further improves this section by converting the assembly context-offset
entries into a c structure. It relies on garbage collection of the
linker removing unreferenced structures from memory, as well as aiding
in readability and future maintenance. Additionally, it eliminates
the #ifs usage in 'context_mgmt.c' source file.

Change-Id: If6075931cec994bc89231241337eccc7042c5ede
Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>

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