tune-zynq: Change ABI to hard-float with thumb
tune-zynq: Change ABI to hard-float with thumb

Zynq-7000 devices support hard-float with thumb-2 instruction set.
Xilinx SDK toolchain with hard-float enabled will be available from
v2016.1 release. Hence the ABI needs to change to match the toolchain.

Signed-off-by: Manjukumar Matha <4c64a17569570cb9f1048973bce031c402b55312@xilinx.com>
Signed-off-by: Nathan Rossi <2e8aa918660411855c6d44d5bb2da677aa033255@nathanrossi.com>

nathanrossi/meta-xilinx,Xilinx/meta-xilinx,Xilinx/meta-xilinx,nathanrossi/meta-xilinx,Xilinx/meta-xilinx,nathanrossi/meta-xilinx,Xilinx/meta-xilinx,nathanrossi/meta-xilinx,Xilinx/meta-xilinx,Xilinx/meta-xilinx