arm/dt: msm9x25: remove inaccurate comments for SMP2P config

Multiple comments in the SMP2P DT configuration file refer to
configuration nodes as being for SMP2P drivers when they are actually
SMP2P devices.

Remove the inaccurate comments.

Change-Id: I72d7ea315df011be865dbd5478b32fa41a09778a
Signed-off-by: Eric Holmberg <eholmber@codeaurora.org>