hikey960: Remove hifi dsp support.

The hifi dsp support wasn't frequently used nor enabled by
default. Since we are moving binary firmware objects to the
vendor package, just remove the hifi dsp logic and firmware
all together.

This patch reapplies the reverted patch of the same name,
as issues were seen when the vendor package was missing.

Signed-off-by: John Stultz <john.stultz@linaro.org>
Change-Id: I6d72e5ca52a4b1b0ca460e0c4613c09175dba02d
145 files changed