target-microblaze: fix swx build breakage The lazy initialisation of r_check was throwing an error on --enable-debug. Removed the lazy initialisation of r_check and swx_addr. Signed-off-by: Peter A. G. Crosthwaite <peter.crosthwaite@petalogix.com> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>