[M] Change in coreboot[master]: include/cpu/msr.h: transform into an union

[Arthur Heymans (Code Review)]

Attention is currently required from: Martin Roth, Raul Rangel.

Arthur Heymans has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/68572 )

Change subject: include/cpu/msr.h: transform into an union
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Patch Set 3:

(1 comment)

File src/include/cpu/x86/msr_access.h:

https://review.coreboot.org/c/coreboot/+/68572/comment/4952c0c9_d578d006 
PS3, Line 10: 	struct {
            : 		unsigned int lo;
            : 		unsigned int hi;
            : 	};
            : 	uint64_t raw;
> Does this handle endianness correctly?

This targets only x86 which is LE.