In preparation for misaligned vector performance hwprobe keys, rename
the hwprobe key values associated with misaligned scalar accesses to
include the term SCALAR. Leave the old defines in place to maintain
source compatibility.

This change is intended to be a functional no-op.
Signed-off-by: Evan Green <evan@rivosinc.com>
Reviewed-by: Charlie Jenkins <charlie@rivosinc.com>
Link: https://lore.kernel.org/r/20240809214444.3257596-3-evan@rivosinc.comSigned-off-by: Palmer Dabbelt <palmer@rivosinc.com>