boards: qemu_x86: Remove QEMU options which break eth_e1000 driver

"-machine type=pc-0.14" appears to be the option which leads to
broken PCI emulation in QEMU, where PCI enumeration reports one
IRQ number (11), while actually IRQ 10 is emulated by QEMU.

"-vga none" and "-display none" appear to be just subordinate of
"-machine type=pc-0.14" and are required to get qemu_x86 into
bootable state.

Fixes: #11706

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
1 file changed