Adjust speaker volumes and add hp filter

Get rid of high-freq distortion at loud volumes, and bump
the in-call speaker values a bit

Change-Id: If63cd384c67efeaa60f5f07f98213c128b853a94
mixer_paths: Fix out-of-scale controls

SPK DRV Volume is 0->8. The closest to stock's 90% is "7"

Change-Id: I4fe41cfabcfafeb9a1f12ac420760a8febc50077