[S] Change in coreboot[master]: nb/intel/haswell/pcie.c: Make UBSAN shut up

[Nico Huber (Code Review)]

Attention is currently required from: Felix Singer, Angel Pons, Arthur Heymans.

Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/72806 )

Change subject: nb/intel/haswell/pcie.c: Make UBSAN shut up
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Patch Set 1: Code-Review+1

(2 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/72806/comment/206303c4_cd34acf4 
PS1, Line 10: and
            : the result of the operation
drop

https://review.coreboot.org/c/coreboot/+/72806/comment/f1fe93ad_0adfd3a3 
PS1, Line 14: integer literals are unsigned so that the shift doesn't overflow.
IIRC, the undefined part is shifting into the sign bit. Technically,
it's not specified in C that the MSB is the sign bit. It's just that
all architectures and compilers happen to use a 2's complement
representation.