m7: change vibrator level to 1700mV to match userspace default value

Change-Id: I159e6fa68a180d759bdf9bc044d53a5757ca419b
i2c: tfa9887: rewrite TFA9887 driver based on NVIDIA release

* Make use of NVIDIA release code to load DSP settings
* Rewrite driver to be less insane

Change-Id: Ibbbf7e14f4f0abdf7d31a255a5f77ce20093c61d
i2c: tfa9887: i2c read/write debugging

Change-Id: Ic59414f45ea7c0892538799aee2ebeac1209aa1e
i2c: tfa9887: add sysfs nodes to initialize, enable DSP

Change-Id: Icb70269ff55338b1262882e1a9aabc81cfd957df