board: somlabs: Remove <common.h> and add needed includes

Remove <common.h> from this board vendor directory and when needed
add missing include files directly.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/somlabs/visionsom-6ull/visionsom-6ull.c b/board/somlabs/visionsom-6ull/visionsom-6ull.c
index 38d14f6..0ecb5c3 100644
--- a/board/somlabs/visionsom-6ull/visionsom-6ull.c
+++ b/board/somlabs/visionsom-6ull/visionsom-6ull.c
@@ -17,7 +17,6 @@
 #include <asm/mach-imx/iomux-v3.h>
 #include <asm/mach-imx/mxc_i2c.h>
 #include <asm/io.h>
-#include <common.h>
 #include <env.h>
 #include <fsl_esdhc_imx.h>
 #include <i2c.h>