ARM: dts: msm: Consolidate lab/ibb panel power supply entries for sdm450

Add lab/ibb panel power supply node in msm8953 mdss panel file.
Same is used for sdm450 MTP and CDP platform.

Change-Id: I4632cd1c0268600565d3e7ce02fa072cdf0986b2
Signed-off-by: Sachin Bhayare <sachin.bhayare@codeaurora.org>