Initial support for "Socrates" board

Signed-off-by: Sergei Poselenov <sposelenov@emcraft.com>
diff --git a/Makefile b/Makefile
index 8743900..3401203 100644
--- a/Makefile
+++ b/Makefile
@@ -2208,6 +2208,9 @@
 	fi
 	@$(MKCONFIG) -a sbc8560 ppc mpc85xx sbc8560
 
+socrates_config:	unconfig
+	@$(MKCONFIG) $(@:_config=) ppc mpc85xx socrates
+
 stxgp3_config:		unconfig
 	@$(MKCONFIG) $(@:_config=) ppc mpc85xx stxgp3