defconfig: apq8084: enable proxy consumer

Proxy consumers are required for stable booting. Enable it on apq8084
based devices.

Change-Id: I6d86e7e8fdbda4d22ae4e8e29b0b3d36cc74d6ea
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>