Change in coreboot[master]: intel/xeon_sp, mb/ocp/deltalake: Rework get_stack_busnos()

[Maxim Polyakov (Code Review)]

Attention is currently required from: Anjaneya "Reddy" Chagam, Angel Pons, Arthur Heymans, Morgan Jang.
Maxim Polyakov has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/49457 )

Change subject: intel/xeon_sp, mb/ocp/deltalake: Rework get_stack_busnos()
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Patch Set 12:

(1 comment)

File src/soc/intel/xeon_sp/util.c:

https://review.coreboot.org/c/coreboot/+/49457/comment/5622f08e_0c8ac8e7 
PS11, Line 23: const uint32_t reg32 = pci_io_read_config32(dev,
             : 		stack / 4 ? UBOX_DECS_CPUBUSNO1_CSR : UBOX_DECS_CPUBUSNO_CSR);
             : 	return reg32 >> (8 * (stack % 4)) & 0xff;
> Uh yes, well spotted. Adding `stack / 4` would not work. Sorry. […]

I think your variant looks better. Thanks