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/board/aristainetos/aristainetos.c b/board/aristainetos/aristainetos.c
index 45ca5da..e95ec81 100644
--- a/board/aristainetos/aristainetos.c
+++ b/board/aristainetos/aristainetos.c
@@ -60,7 +60,7 @@
 
 #if (CONFIG_SYS_BOARD_VERSION == 1)
 #include "./aristainetos-v1.c"
-#elif (CONFIG_SYS_BOARD_VERSION == 2)
+#elif ((CONFIG_SYS_BOARD_VERSION == 2) || (CONFIG_SYS_BOARD_VERSION == 3))
 #include "./aristainetos-v2.c"
 #endif
 
@@ -174,7 +174,7 @@
 			.vmode          = FB_VMODE_NONINTERLACED
 		}
 	}
-#if (CONFIG_SYS_BOARD_VERSION == 2)
+#if ((CONFIG_SYS_BOARD_VERSION == 2) || (CONFIG_SYS_BOARD_VERSION == 3))
 	, {
 		.bus	= -1,
 		.addr	= 0,