Change in flashrom[master]: ft2232_spi.c: Implement spi_send_multicommand()

[Nico Huber (Code Review)]

Attention is currently required from: Simon Buhrow, Alan Green, Nico Huber, Edward O'Callaghan, Anastasia Klimchuk, Samir Ibradžić.
Nico Huber has uploaded a new patch set (#36) to the change originally created by Simon Buhrow. ( https://review.coreboot.org/c/flashrom/+/40477 )

Change subject: ft2232_spi.c: Implement spi_send_multicommand()
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ft2232_spi.c: Implement spi_send_multicommand()

Every ftdi_write_data() call is quite time consuming as the ftdi-chips
seems to take always 2-3ms to respond. This leads to what the comment
already says: Minimize USB transfers by packing as many commands as
possible together. So I packed the WREN command together with the
following operation which can be program or erase operation.

This saves about 1 minute when programming a 128MBit Flash within a
virtualized setup.

Signed-off-by: Simon Buhrow 
Change-Id: Ie4a07499ec5ef0af23818593f45dc427285a9e8a
---
M ft2232_spi.c
1 file changed, 90 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/77/40477/36