misc: Rename apq8084_dock to liquid_dock

The LiQUID dock support driver is not specific to the
APQ8084 SoC. Rename it to reflect its generality since
it can be used for other MSM/APQ LiQUID platforms.

Change-Id: I4a969077c543cd84e98dd198d3d7670b6071605a
Signed-off-by: Jack Pham <jackp@codeaurora.org>