ARM: dts: msm: add supported sizes and ramp index for PMA8084 LPG channels

LPG/PWM channel's qcom,supported-sizes and qcom,ramp-index
are mandatory properties which are needed in order for LPG/PWM
channels to initialize properly. So update the PMA8084 LPG/PWM
channels qcom,supported-sizes and qcom,ramp-index properties.

Change-Id: I9140a67013810b222080c9d4c235e6040878789d
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>