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

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

Reviewed-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Tom Rini <trini@konsulko.com>

board/bsh/imx6ulz_smm_m2/imx6ulz_smm_m2.c

@@ -14,7 +14,6 @@
 #include <asm/mach-imx/boot_mode.h>
 #include <asm/global_data.h>
 #include <asm/gpio.h>
-#include <common.h>
 #include <env.h>
 #include <linux/sizes.h>
 

board/bsh/imx6ulz_smm_m2/spl.c

@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0+
 
-#include <common.h>
 #include <cpu_func.h>
 #include <hang.h>
 #include <init.h>

board/bsh/imx8mn_smm_s2/imx8mn_smm_s2.c

@@ -3,7 +3,6 @@
  * Copyright 2021 Collabora Ltd.
  */
 
-#include <common.h>
 #include <asm/arch/sys_proto.h>
 #include <env.h>