Change in coreboot[master]: lib: Add __fls() (Find Last Set)

[Jianjun Wang (Code Review)]

Attention is currently required from: Hung-Te Lin, Shelley Chen, Jakub Czapiga, Paul Menzel, Julius Werner, Yu-Ping Wu.
Jianjun Wang has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59738 )

Change subject: lib: Add __fls() (Find Last Set)
......................................................................

Patch Set 6:

(3 comments)

File payloads/libpayload/include/libpayload.h:

https://review.coreboot.org/c/coreboot/+/59738/comment/f1196150_e4f7afdd 
PS5, Line 460: /* Find Last Set: __fls(1) == 0, fls(5) == 2, fls(1 << 31) == 31 */
> same

Done

File src/commonlib/bsd/include/commonlib/bsd/helpers.h:

https://review.coreboot.org/c/coreboot/+/59738/comment/9d30e3a0_68cdc922 
PS1, Line 137: fls
> yes please

Done

File src/include/lib.h:

https://review.coreboot.org/c/coreboot/+/59738/comment/2aead762_1199f033 
PS5, Line 56: /* Find Last Set: __fls(1) == 0, fls(5) == 2, fls(1 << 31) == 31 */
> __fls, not fls

Done