[XS] Change in coreboot[main]: mb/dell/optiplex_9020: Fix UB challenged package power calculation

[Angel Pons (Code Review)]

Attention is currently required from: Máté Kukri, Nico Huber.

Angel Pons has posted comments on this change by Máté Kukri. ( https://review.coreboot.org/c/coreboot/+/83736?usp=email )

Change subject: mb/dell/optiplex_9020: Fix UB challenged package power calculation
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Patch Set 1: Code-Review+1

(3 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/83736/comment/25655f20_09127fa4?usp... :
PS1, Line 7: UB challenged
What does "UB challenged" mean?

File src/mainboard/dell/optiplex_9020/mainboard.c:

https://review.coreboot.org/c/coreboot/+/83736/comment/ef057a87_d3b0d514?usp... :
PS1, Line 306: unsigned int pkg_power, power_unit;
             : 	pkg_power = rdmsr(0x614).lo & 0x7fff;
             : 	power_unit = 1 << (rdmsr(0x606).lo & 0xf);
```suggestion
    const unsigned int pkg_power = rdmsr(0x614).lo & 0x7fff;
    const unsigned int power_unit = 1 << (rdmsr(0x606).lo & 0xf);
```

https://review.coreboot.org/c/coreboot/+/83736/comment/03e46514_15af6ec7?usp... :
PS1, Line 309: 0x41
nit: `65` is a more meaningful value