feat(cros): add GSC, DRM, and Stable HUK SMC handlers

Add new SMC handlers to set the GSC counter key, DRM device key, and
Stable Hardware Unique Key for ChromeOS Widevine. These keys are then
passe

feat(cros): add GSC, DRM, and Stable HUK SMC handlers

Add new SMC handlers to set the GSC counter key, DRM device key, and
Stable Hardware Unique Key for ChromeOS Widevine. These keys are then
passed to the OP-TEE device tree node.

Change-Id: Id31f8101d9783e709c9984089674220d93596531
Signed-off-by: Yidi Lin <yidilin@google.com>

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feat(cros_widevine): add ChromeOS widevine SMC handler

The ChromeOS will use the SMC to pass some secrets from firmware to
optee.

Change-Id: Iaf3357d40a7ed22415926acd9d7979df24dd81f1
Signed-off-by:

feat(cros_widevine): add ChromeOS widevine SMC handler

The ChromeOS will use the SMC to pass some secrets from firmware to
optee.

Change-Id: Iaf3357d40a7ed22415926acd9d7979df24dd81f1
Signed-off-by: Yi Chou <yich@google.com>

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