evkmimxrt595: Remove dependency on board header file

The flash_config file includes a board.h file which is not
available on non-NXP boards. This breaks the build for
those platforms when compiling Zephyr

Signed-off-by: Mahesh Mahadevan <[email protected]>

Author: mmahadevan108

mcux/README

@@ -74,3 +74,5 @@ Patch List:
       mcux/mcux-sdk/devices/MIMXRT685S/MIMXRT685S_cm33.h
       mcux/mcux-sdk/devices/MIMXRT685S/MIMXRT685S_dsp.h
 
+   * Avoid including board.h from flash_config.c file in evkmimxrt595 board folder. The following file are touched by this commit:
+      mcux/mcux-sdk/boards/evkmimxrt595/flash_config/flash_config.c  

mcux/mcux-sdk/boards/evkmimxrt595/flash_config/flash_config.c

@@ -5,7 +5,7 @@
  * SPDXLicense-Identifier: BSD-3-Clause
  */
 #include "flash_config.h"
-#include "board.h"
+/* #include "board.h" */
 
 /* Component ID definition, used by tools. */
 #ifndef FSL_COMPONENT_ID