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

[9elements QA (Code Review)]

9elements QA has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59738 )

Change subject: lib: Add __fls() (Find Last Set)
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Patch Set 7:

Automatic boot test returned (PASS/FAIL/TOTAL): 7 / 1 / 8

PASS: x86_32  "ThinkPad T500" , build config LENOVO_T500 
     and payload SeaBIOS : https://lava.9esec.io/r/84344
PASS: x86_32  "HP Z220 SFF Workstation" , build config HP_Z220_SFF_WORKSTATION 
     and payload LinuxBoot_BB_kexec : https://lava.9esec.io/r/84343
PASS: x86_64  "HP Compaq 8200 Elite SFF PC" , build config HP_COMPAQ_8200_ELITE_SFF_PC.X86_64 
     and payload SeaBIOS : https://lava.9esec.io/r/84342
PASS: x86_32  "HP Compaq 8200 Elite SFF PC" , build config HP_COMPAQ_8200_ELITE_SFF_PC 
     and payload SeaBIOS : https://lava.9esec.io/r/84341
FAIL: x86_64  "QEMU x86 i440fx/piix4" , build config EMULATION_QEMU_X86_I440FX_X86_64 
     and payload SeaBIOS : https://lava.9esec.io/r/84340
PASS: x86_32  "QEMU x86 i440fx/piix4" , build config EMULATION_QEMU_X86_I440FX_ASAN 
     and payload SeaBIOS : https://lava.9esec.io/r/84339
PASS: x86_32  "QEMU x86 i440fx/piix4" , build config EMULATION_QEMU_X86_I440FX_ 
     and payload SeaBIOS : https://lava.9esec.io/r/84338
PASS: x86_32  "QEMU x86 i440fx/piix4" , build config EMULATION_QEMU_X86_I440FX 
     and payload SeaBIOS : https://lava.9esec.io/r/84337

Please note: This test is under development and might not be accurate at all!