ieee802154: mcr20a: Cleanup Kconfig and DT support

Now that all SPI controllers support DTS we can remove the Kconfig
support for non-DTS options.  We also cleanup some defines that should
have be DT_MCR20A_ instead of CONFIG_MCR20A_.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
4 files changed