arm, imx6: add aristainetos 2b board version

there is a 2b board version of the aristainetos2
board. Differences to the v2:

- spi cs for the nor flash and display controller
  changed
- some pinmux changes
- LED gpio settings changed

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/configs/aristainetos2b_defconfig b/configs/aristainetos2b_defconfig
new file mode 100644
index 0000000..af2dbc6
--- /dev/null
+++ b/configs/aristainetos2b_defconfig
@@ -0,0 +1,7 @@
+CONFIG_ARM=y
+CONFIG_ARCH_MX6=y
+CONFIG_TARGET_ARISTAINETOS2B=y
+CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/aristainetos/aristainetos2.cfg,MX6DL"
+# CONFIG_CMD_IMLS is not set
+# CONFIG_CMD_FLASH is not set
+CONFIG_SPI_FLASH=y