Change in coreboot[master]: soc/qualcomm/common/qspi: Add support for common QSPI driver

[Ravi kumar (Code Review)]

Attention is currently required from: Shelley Chen, Ravi kumar, Roja Rani Yarubandi, mturney mturney, Julius Werner.
Hello Shelley Chen, build bot (Jenkins), Roja Rani Yarubandi, mturney mturney, Julius Werner,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/55323

to look at the new patch set (#10).

Change subject: soc/qualcomm/common/qspi: Add support for common QSPI driver
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soc/qualcomm/common/qspi: Add support for common QSPI driver

Add common QSPI functionalities for qualcomm SoC targets.

This common QSPI driver works in master mode and provides read/write
operation for the slave devices like Flash.

BUG=b:182963902
TEST=Validated on qualcomm sc7180 and sc7280 development board

Signed-off-by: Rajesh Patil 
Change-Id: I5b3816b823e14db1dd13f1eb4a6761c7a61604b9
---
A src/soc/qualcomm/common/include/soc/qspi_common.h
A src/soc/qualcomm/common/qspi.c
A src/soc/qualcomm/common/spi.c
3 files changed, 440 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/23/55323/10