cr50: Refactor tracking vendor command origin

Added flags parameter to extension_route_command().  The caller now
specifies whether the command comes from the USB interface or the AP.

Moved USB-specific shuffling of response to embed result code into
usb_upgrade.c, so extension_route_command() can be more generic.

No change to permissions/behavior for existing commands.
ccd_command_wrapper() still sends vendor commands as if they come from
the AP.  That's fixed in the next CL.

Reduces code size by 128 bytes

BUG=b:79983505
BRANCH=cr50
TEST=manual
	Build with DEBUG_EXTENSION defined, to turn on printing each command
	'ccd lock' comes from AP and works
	From host, 'gscutil -I' comes from USB and fails
	From AP, 'gscutil -t -I' comes from AP and works

Change-Id: I7136bb54073de9c5951a174c308151b1871c56f3
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1068101
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>

0 files changed, 0 insertions, 0 deletions