Merge branch 'bpf-skip-bounds-adjustment-for-conditional-jumps-on-same-scalar-register'

KaFai Wan says:

====================
bpf: Skip bounds adjustment for conditional jumps on same scalar register

This small patchset is about avoid verifier bug warning when conditional
 jumps on same register when the register holds a scalar with range.

v4:
  - make code better. (Alexei)

v3:
  https://lore.kernel.org/bpf/20251031154107.403054-1-kafai.wan@linux.dev/
  - Enhance is_scalar_branch_taken() to handle scalar case. (Eduard)
  - Update the selftest to cover all conditional jump opcodes. (Eduard)

v2:
  https://lore.kernel.org/bpf/20251025053017.2308823-1-kafai.wan@linux.dev/
 - Enhance is_branch_taken() and is_scalar_branch_taken() to handle
   branch direction computation for same register. (Eduard and Alexei)
 - Update the selftest.

v1:
  https://lore.kernel.org/bpf/20251022164457.1203756-1-kafai.wan@linux.dev/
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====================

Link: https://patch.msgid.link/20251103063108.1111764-1-kafai.wan@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>