spi: Zap mpc52xx_spi.c, config and related code

armada100_spi.c, related config options and related codes
are zapping becuase of "no DM conversion".

Cc: Werner Pfister <Pfister_Werner@intercontrol.de>
Signed-off-by: Jagan Teki <jagan@openedev.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/board/intercontrol/digsy_mtc/Makefile b/board/intercontrol/digsy_mtc/Makefile
index fd0c2f9..4d13ead 100644
--- a/board/intercontrol/digsy_mtc/Makefile
+++ b/board/intercontrol/digsy_mtc/Makefile
@@ -4,5 +4,5 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-obj-y	:= digsy_mtc.o cmd_mtc.o
+obj-y	:= digsy_mtc.o
 obj-$(CONFIG_VIDEO) += cmd_disp.o