raiden_debug_spi.c: Add USB context states and helper functions

Add context states to handle the USB packets, these allow us to
simplify the process of loading data from the transmit buffer
into a USB packets' data section and from a USB packet to it's
receive buffers. These will also keep track of the size of the USB
packet allowing a simpler interface to transmit them.

Helper functions have been added to help with copying data between
the transmit and receive context states to and from the USB packets.

BUG=b:139058552
BRANCH=none
TEST=Manual testing of ServoMicro and Flashrom when performing
    reads, writes, and verification of the EC firmware on Nami.
TEST=Builds

Signed-off-by: Brian J. Nemec <bnemec@chromium.com>
Change-Id: Id7b598b39923b4b8c1b6905e5d5c5a2be4078f96
Reviewed-on: https://review.coreboot.org/c/flashrom/+/43550
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>

0 files changed, 0 insertions, 0 deletions