sr: Use pathmap for recovery

Change-Id: I6350618e1e04819d52f1049f9f2fb61c833a1b45
recovery: turn on the backlight in recovery mode

The backlight is not turned on by default in some devices. This leads to
nothing displayed in recovery mode.

Change-Id: Iae5b0440f79fdcb79e103744a242e12c96b02c00