Use wl12xx firmware in hardware/ti/wlan instead of our own copy

Change-Id: I4a13c6ceec67a12c45455dd37383112dcf5a6b5c
Reduce frame rate reported by framebuffer HAL to 54 Hz

This matches a corresponding kernel change to run the panel at 54 Hz
(allowing us to reduce the pixel clock to allow downscaling of larger
images).

Change-Id: Ib3e6ce2e2ac337fc5dfb2b02ccd31a708decda7b
Add <linux/omapfb.h> header needed for hwcomposer
Enable building of hwcomposer.omap3
Build audio HAL components from source instead of using prebuilts