msm8974: initial overlays

* fw/b and power kanged from hammerhead
* storage from jflte

Change-Id: I2243fd2558ab8682fa8c6001e891533d5759c8f4
props: set ro.sf.lcd_density

Change-Id: I3a69faf5dcdb321b8affe43dc4e56e1f3d5f5ee0