Merge branch 'bpf-arm64-stack-argument-fixes'

Puranjay Mohan says:

====================
bpf, arm64: Stack argument fixes

Patch 1 fixes a redundant MOV in the arm64 JIT's
emit_stack_arg_store_imm() and clarifies the stack layout comments. This
is not a bug fix but an improvement.

Patch 2 bumps the stack argument tests from 6-8 args to at least 10 so
they actually exercise the native stack on arm64, where x0-x7 cover the
first 8 arguments.
====================

Link: https://patch.msgid.link/20260528161750.1900674-1-puranjay@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>