kernel: backport spi-nor driver from 4.4.9

...penwrt/0019-Support-LibreSSL-as-provider-of-openssl.patch

...nor-disable-protection-for-Winbond-flash-at-startup.patch

...-both-HWID-and-HWREV-on-upgrades-of-TP-LINK-devices.patch

...EL-ending-with-a-space-on-some-TP-LINK-like-devices.patch

...devices-in-AR71XX_MODEL-to-match-labels-image-names.patch

.../openwrt/0023-ar71xx-build-image-for-TL-WR710N-v2.1.patch

...-build-fix-configure-compatiblity-with-POSIX-shells.patch

...ort-name-which-was-only-added-in-the-latest-version.patch

...wrt/0026-tools-compile-flock-before-everything-else.patch

...-been-built-yet-fall-back-to-unlocked-shell-command.patch

...nloads-fixes-race-conditions-with-multiple-variants.patch

...9-download.mk-fix-packed-checkout-mirroring-support.patch

...nwrt/0030-kernel-backport-spi-nor-driver-from-4.4.9.patch

...spi-nor-wait-until-status-register-writes-are-ready.patch

...enwrt/0032-kernel-mtd-spi-nor-unlock-Winbond-flashs.patch