Attention is currently required from: Nico Huber, Subrata Banik, Edward O'Callaghan, Angel Pons, Anastasia Klimchuk.

Subrata Banik uploaded patch set #7 to this change.

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ichspi: Refactor Flashrom HW Sequencing Operation

List of changes:
1. Add a unified `execute SPI flash transfer` function that does:
   - Check the SCIP bit prior initiate new operation.
   - Start the transfer by setting address and length for transfer,
     finally set FGO bit.
   - Wait for the transaction to get completed/failed/timed out.
2. All HW Sequencing SPI operation uses `execute SPI flash transfer`
   function

BUG=b:223630977
TEST=Able to perform read/write/erase operation on PCH 600 series
chipset (board name: Brya).

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: Ic9fd50841449e02f476a8834f4642d6ecad36dc3
---
M ichspi.c
1 file changed, 42 insertions(+), 52 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/69/62869/7

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