CRIS: proper defconfig setup

This patch moves the cris defconfigs to arch/cris/configs/ where they
belong.

As a side effect they can now be used directly through e.g.
  make ARCH=cris artpec_3_defconfig

The default defconfig is set through KBUILD_DEFCONFIG.
Signed-off-by: Adrian Bunk <adrian.bunk@movial.fi>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>

arch/cris/Makefile

@@ -10,6 +10,8 @@
 # License.  See the file "COPYING" in the main directory of this archive
 # for more details.
 
+KBUILD_DEFCONFIG := etrax-100lx_v2_defconfig
+
 arch-y := v10
 arch-$(CONFIG_ETRAX_ARCH_V10) := v10
 arch-$(CONFIG_ETRAX_ARCH_V32) := v32