Makefile: added -gnu to EXTRAVERSION
README: added blurb about GNU Linux-libre
include/linux/firmware.h: added non-Free firmware notification support
include/linux/ihex.h: added non-Free ihex firmware notification support
drivers/base/firmware_class.c: shorten non-Free firmware fail-to-load timeout

MICROCODE_AMD - AMD microcode patch loading support
arch/x86/kernel/cpu/microcode/amd.c: disabled non-Free firmware-loading machinery
arch/x86/kernel/cpu/microcode/amd.c: removed blobs or mentions thereof

MICRO