linux-nilrt: Remove do_configure_prepend()
linux-nilrt: Remove do_configure_prepend()

Copying defconfig to .config was a workaround for the bug fixed in
oe-core commit "kernel-yocto: do_configme: Add $TOOLCHAIN_OPTIONS to
CFLAGS". Now that it's fixed, it is not needed anymore.

Signed-off-by: Ioan-Adrian Ratiu <7ec73abcfe099fc5574c01312b62768070c80980@ni.com>

ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt