Revert "adi-hdmi-load: don't load fpga iic driver"

This reverts commit 4dfd42b6de2f96ca543fc70b0a1448f8e10ac665.
zynq-base.inc: Recommend fpga-image, remove unused variable

Recommend fpga-image so that "generic" images can use PL.
Unused FSBL variable.
Migrate design to latest version for Zedboard

This (probably) breaks the zc702 build. I'm very sorry for that.

New zedboard design that uses PL330 DMA for audio.
Upgrade to (merged) kernel 3.9 (from ADI and XILINX)
Update defconfig and devicetree to match the new configuration.

The FSBL must be built outside the tree for now. u-boot will fail
to build unless you change the recipe to fetch a proper fsbl.elf.