Change in coreboot[master]: drivers/generic/bayhub_lv2: Add driver for BayHub lv2

[John Su (Code Review)]

Attention is currently required from: Frank Wu, Furquan Shaikh, Alan Lee, Martin Roth, Angel Pons, Ivy Jian, EricR Lai.
John Su has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/49783 )

Change subject: drivers/generic/bayhub_lv2: Add driver for BayHub lv2
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Patch Set 6:

(3 comments)

File src/drivers/generic/bayhub_lv2/chip.h:

https://review.coreboot.org/c/coreboot/+/49783/comment/1dfa53d1_66b5e804 
PS5, Line 3: #include <acpi/acpi_device.h>
> I don't think this is required.

Done

https://review.coreboot.org/c/coreboot/+/49783/comment/2ea42bda_c08cdc7a 
PS5, Line 6: /*
           :  * Bayhub LV2 PCI to SD bridge
           :  */
> Use /* */ or // for short comments: https://doc.coreboot.org/coding_style. […]

Done

File src/drivers/generic/bayhub_lv2/lv2.h:

https://review.coreboot.org/c/coreboot/+/49783/comment/7be20d46_cb5960d8 
PS5, Line 29:
>

Done