arm/dt: msm8626: 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: Ic903df434aac343f30c771d4841361b81e59b196
Signed-off-by: Eric Holmberg <eholmber@codeaurora.org>