extmod/vfs_fat: Allow setting label of partition when creating FAT fs#15495

tstenvold wants to merge 4 commits intomicropython:mastermicropython/micropython:masterfrom

tstenvold:allow-setting-vfs-fat-label-with-mkfststenvold/micropython:allow-setting-vfs-fat-label-with-mkfsCopy head branch name to clipboard