target: msm8909: configure MPP based on the PMIC type.

Current way of configuring MPP based on platform subtype is not
reliable as there will be many combinations. Check for PMIC
version for this so that MPP4 is used for backlight on 8909
targets with PM8916 and MPP2 is used on other 8909targets.

Change-Id: I2054e4166fce163f77cec77fbf64550e8421dbd9
1 file changed