meta-xilinx: tune-zynq: Corrected forced setting of IMAGE_FSTYPES
meta-xilinx: tune-zynq: Corrected forced setting of IMAGE_FSTYPES

Signed-off-by: Sipke Vriend <034ddfb901b1f7dc7cb2d73f81a961ba447836c1@xilinx.com>

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