configs/qemu_ppc_virtex_ml507: remove defconfig
Support for this board was removed in Linux upstream [1] since Xilinx
new design tools dropped these platforms in 2013, along with all
PPC405/PPC440 new designs. They are not maintained nor tested anymore.
[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=
7ade8495dcfd788a76e6877c9ea86f5207369ea4
Signed-off-by: Geoffrey Le Gourriérec <geoffrey.legourrierec@gmail.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>