imx8mp_evk: Remove unneeded header files

Cleanup the file by removing unneeded header files.

Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>

board/freescale/imx8mp_evk/imx8mp_evk.c

@@ -3,20 +3,7 @@
  * Copyright 2019 NXP
  */
 
-#include <common.h>
 #include <env.h>
-#include <errno.h>
-#include <init.h>
-#include <linux/delay.h>
-#include <asm/global_data.h>
-#include <asm/mach-imx/iomux-v3.h>
-#include <asm-generic/gpio.h>
-#include <asm/arch/imx8mp_pins.h>
-#include <asm/arch/clock.h>
-#include <asm/arch/sys_proto.h>
-#include <asm/mach-imx/gpio.h>
-
-DECLARE_GLOBAL_DATA_PTR;
 
 int board_init(void)
 {