Change in coreboot[master]: sc7280: Enable UART driver

[Ravi Kumar Bokka (Code Review)]

Attention is currently required from: Shelley Chen, Ravi kumar, mturney mturney, Julius Werner, Rajesh Patil.
Ravi Kumar Bokka has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/55963 )

Change subject: sc7280: Enable UART driver
......................................................................

Patch Set 27:

(3 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/55963/comment/6984c7e7_8151e832 
PS15, Line 7: Refactor
> Enable

Done

https://review.coreboot.org/c/coreboot/+/55963/comment/7621c137_87fa84e8 
PS15, Line 9: Refactor UART driver by separating
            : common and SoC specific driver code.
            :
> Enable common Uart driver on sc7280

Done

File src/soc/qualcomm/sc7280/Kconfig:

https://review.coreboot.org/c/coreboot/+/55963/comment/0030f1cd_5f2adaa4 
PS26, Line 17: COMPRESS_BOOTBLOCK
> I think that this is supposed to go with the previous CL in the stack (CB:52131)

Done