arch: arm: aarch32: cmsis: include soc.h after other Zephyr headers

Some platforms, e.g. NXP LPC, pollute the namespace with definitions
like ARRAY_SIZE, MIN, MAX, etc. Since they don't re-define if already
defined, we're lucky enough to be able to "fix" this problem by
re-ordering includes. This likely deserves a proper fix, either by
patching offending code or Zephyr using a namespace. The "don't
re-define" technique makes implementation dependent on the include
order, i.e. poor/bad solution.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>