Revert "LZ4: compression/decompression signedness mismatch (v2)"

This reverts commit 77eb4a11e77f28d5e8951d415af047fe7ad0c1ed.
Revert "crypto-add-lz4-cryptographic-api-fix"

This reverts commit 380532a04606f95bc3ca2be6c95da1350f336b5e.
Revert "crypto: add lz4 Cryptographic API"

This reverts commit e9d3532e812c4eaa75070f4c6b41291cb8f3a4ab.
Revert "lib-add-lz4-compressor-module-fix"

This reverts commit edb682276ed8ceee8130cf2efec58043dd3e4055.
Revert "lib: add lz4 compressor module"

This reverts commit 4e80334d63205d51c639a4865e948c69a3d421f3.
Revert "arm: Remove enforced Os flag for LZ4 decompressor"

This reverts commit 604cfe0654067baccbe24d36a47221854b05a841.
Revert "arm: add support for LZ4-compressed kernel"

This reverts commit a4aea5bc21bb60ac9946507154b14ba8da55079a.

Conflicts:
	arch/arm/boot/compressed/.gitignore
	arch/arm/boot/compressed/Makefile
Revert "kbuild: fix for updated LZ4 tool with the new streaming format"

This reverts commit d54a3aad85caa3ab8315ecea4a03a2174b012593.
Revert "lib: add support for LZ4-compressed kernel"

This reverts commit c9622d2549702a19dd9a9d00b5a5fcb444385911.
Revert "decompressor: add LZ4 decompressor module"

This reverts commit 39061ca8825ffaae61d998c511ae765d26f4edba.