linux: add shared patch for when compiling kernels older than 5.5

After some somewhat recent gcc update I get some new error on at least samsung's kernels based on 3.4 and 3.10, looking something like:

/linux/arch/arm/mm/proc-v7.S: Assembler messages:
/linux/arch/arm/mm/proc-v7.S:425: Error: junk at end of line, first unrecognized character is `#'

Add a shared patch for it.

Probably needed on all kernel older than 5.5, but probably modifications are needed for other kernel versions, so marked linux3.4 for now.