qemuboot-xilinx.bbclass: Remove the subdir added to the qemu target path
Remove the variable QB_SYSTEM_NAME inside qemuboot-xilinx class as it no longer
is needed to include the subdir for the qemu target path.  All targets are now
moved to bindir and not present in bindir/qemu-xilinx.
# enable the overrides for the context of the conf only
OVERRIDES .= ":qemuboot-xilinx"
-# setup the target binary
-QB_SYSTEM_NAME_prepend_aarch64 = "qemu-xilinx/"
-QB_SYSTEM_NAME_prepend_microblaze = "qemu-xilinx/"
-
# Default machine targets for Xilinx QEMU (FDT Generic)
QB_MACHINE_aarch64 = "-machine arm-generic-fdt"
QB_MACHINE_arm = "-machine arm-generic-fdt-7series"
