Change in coreboot[master]: soc/intel/common: Implement IOC driver

[Wonkyu Kim (Code Review)]

Attention is currently required from: Jamie Ryu, Subrata Banik, Ethan Tsao, Ravishankar Sarawadi, Paul Menzel, Tim Wawrzynczak, Angel Pons, Nick Vaccaro.
Wonkyu Kim has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/63198 )

Change subject: soc/intel/common: Implement IOC driver
......................................................................

Patch Set 17:

(4 comments)

File src/soc/intel/common/block/ioc/ioc.c:

https://review.coreboot.org/c/coreboot/+/63198/comment/7d5cdca7_4c4e75e2 
PS17, Line 12: get_mchbar
> You mean move get_mchbar api in systemagent_early. […]

Ack

https://review.coreboot.org/c/coreboot/+/63198/comment/2aaa0b7f_567f12b7 
PS17, Line 25: void ioc_reg_write32(uint32_t offset, uint32_t value)
             : {
             : 	uint32_t mchbar = get_mchbar();
             : 
             : 	if(mchbar)
             : 		write32p(MCH_BASE_ADDRESS + offset, value);
             : }
> void ioc_reg_write32(uint32_t offset, uint32_t value) […]

Ack

https://review.coreboot.org/c/coreboot/+/63198/comment/27112608_74b7b193 
PS17, Line 36: 	if(mchbar)
> Please add a blank line above.

Ack

https://review.coreboot.org/c/coreboot/+/63198/comment/82a05d3a_5dc0593b 
PS17, Line 44: 	data32 = ioc_reg_read32(offset);
> Ditto.

Ack