[XS] Change in coreboot[main]: src/include: Introduce a new BIT_FLAG_32(x) macro

[Jérémy Compostella (Code Review)]

Attention is currently required from: Ashish Kumar Mishra, Martin Roth, Pratikkumar V Prajapati, Saurabh Mishra, Subrata Banik.

Jérémy Compostella has posted comments on this change by Saurabh Mishra. ( https://review.coreboot.org/c/coreboot/+/84142?usp=email )

Change subject: src/include: Introduce a new BIT_FLAG_32(x) macro
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Patch Set 16:

(1 comment)

File src/include/types.h:

https://review.coreboot.org/c/coreboot/+/84142/comment/dfd945b1_70596801?usp... :
PS16, Line 24: #ifndef BIT_FLAG_32
Any chance we could have a short comment to explain why we do not define the more common BIT_32(x) macro. What about?
```
/*
 * This macro declares a bit as a 32-bits unsigned integer. The common BIT_32(x) macro is already defined by some external header file. To avoid any conflicts, we used a different name. 
 */
```