coreboot arm64: Add library for system access

Add support for library functions required to access different system registers:
1) PSTATE and special purpose registers
2) System control registers
3) Cache-related registers
4) TLB maintenance registers
5) Misc barrier related functions

BUG=None
BRANCH=None
TEST=Compiles successfully

Original-Change-Id: I8809ca2b67b8e560b34577cda1483ee009a1d71a
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/203490
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org>
(cherry picked from commit 5da840c5d1f3d8fdf8cc0d7c44772bf0cef03fbb)

armv8: GPL license armv8 lib

BUG=None
BRANCH=None
TEST=Compiles successfully.

Original-Change-Id: Ibe0f09ef6704ad808cc482ffec27a4db32d7f6fd
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/250950
Original-Trybot-Ready: Furquan Shaikh <furquan@chromium.org>
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org>
(cherry picked from commit bc115869bb0bcedbc284677ca5743b9ab40bfc7e)

Get the library and the GPL license in a single commit.

Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I4753a6b0d13a6f7515243bfa8e749e250fdd749d
Reviewed-on: http://review.coreboot.org/8465
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
11 files changed