m68k: make multi_defconfig the default defconfig

It seems to match the intention behind multi_defconfig to make it the
default defconfig.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/m68k/Makefile b/arch/m68k/Makefile
index b15173f..8133dbc 100644
--- a/arch/m68k/Makefile
+++ b/arch/m68k/Makefile
@@ -13,7 +13,7 @@
 # Copyright (C) 1994 by Hamish Macdonald
 #
 
-KBUILD_DEFCONFIG := amiga_defconfig
+KBUILD_DEFCONFIG := multi_defconfig
 
 # override top level makefile
 AS += -m68020