arm: add support for LZ4-compressed kernel
Integrates the LZ4 decompression code to the arm pre-boot code.

Change-Id: Iccfe04cfb1ac3bf9089621110f869fb2f83f4bc2
Merge "arm: add support for LZ4-compressed kernel Integrates the LZ4 decompression code to the arm pre-boot code." into du44