arm: include: Add DTS generated file to arch.h

This patch moves the include for the generated_dts_board.h inside of
the include/arch/arm/arch.h file.  This was done to simplify the
includes required for files.  Only two files will include the dts
generated include file directly: arch.h and the linker.ld

Change-Id: I2614f4fd4eeed2ab635a3264d7dac8b83f97b760
Signed-off-by: Andy Gross <andy.gross@linaro.org>

arch/arm/core/cortex_m/irq_vector_table.c

@@ -21,7 +21,7 @@
 
 #include <toolchain.h>
 #include <sections.h>
-#include <generated_dts_board.h>
+#include <arch/cpu.h>
 
 extern void _isr_wrapper(void);
 typedef void (*vth)(void); /* Vector Table Handler */

arch/arm/core/cortex_m/prep_c.c

@@ -22,7 +22,6 @@
 #include <linker-defs.h>
 #include <nano_internal.h>
 #include <arch/arm/cortex_m/cmsis.h>
-#include <generated_dts_board.h>
 
 #ifdef CONFIG_ARMV6_M
 static inline void relocate_vector_table(void) { /* do nothing */ }

arch/arm/core/cortex_m/reset.S

@@ -17,7 +17,6 @@
 #include <arch/cpu.h>
 #include <offsets_short.h>
 #include "vector_table.h"
-#include <generated_dts_board.h>
 
 _ASM_FILE_PROLOGUE