common: Drop flash.h from common header

Move this uncommon header out of the common header.

Fix up some style problems in flash.h while we are here.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/freescale/common/fsl_validate.c b/board/freescale/common/fsl_validate.c
index 2bf9d58..6aa412a 100644
--- a/board/freescale/common/fsl_validate.c
+++ b/board/freescale/common/fsl_validate.c
@@ -5,6 +5,7 @@
 
 #include <common.h>
 #include <dm.h>
+#include <flash.h>
 #include <fsl_validate.h>
 #include <fsl_secboot_err.h>
 #include <fsl_sfp.h>
diff --git a/board/freescale/m5253demo/flash.c b/board/freescale/m5253demo/flash.c
index a5223ec..8736856 100644
--- a/board/freescale/m5253demo/flash.c
+++ b/board/freescale/m5253demo/flash.c
@@ -8,6 +8,7 @@
  */
 
 #include <common.h>
+#include <flash.h>
 #include <irq_func.h>
 
 #include <asm/immap.h>
diff --git a/board/freescale/mpc8568mds/bcsr.c b/board/freescale/mpc8568mds/bcsr.c
index 28e2a94..b1e638a 100644
--- a/board/freescale/mpc8568mds/bcsr.c
+++ b/board/freescale/mpc8568mds/bcsr.c
@@ -4,6 +4,7 @@
  */
 
 #include <common.h>
+#include <flash.h>
 #include <asm/io.h>
 
 #include "bcsr.h"
diff --git a/board/freescale/mpc8568mds/mpc8568mds.c b/board/freescale/mpc8568mds/mpc8568mds.c
index 5167f81..da97495 100644
--- a/board/freescale/mpc8568mds/mpc8568mds.c
+++ b/board/freescale/mpc8568mds/mpc8568mds.c
@@ -6,6 +6,7 @@
  */
 
 #include <common.h>
+#include <flash.h>
 #include <init.h>
 #include <pci.h>
 #include <asm/processor.h>
diff --git a/board/freescale/mpc8569mds/bcsr.c b/board/freescale/mpc8569mds/bcsr.c
index 57cea0a..9ed00f6 100644
--- a/board/freescale/mpc8569mds/bcsr.c
+++ b/board/freescale/mpc8569mds/bcsr.c
@@ -4,6 +4,7 @@
  */
 
 #include <common.h>
+#include <flash.h>
 #include <asm/io.h>
 
 #include "bcsr.h"
diff --git a/board/freescale/mpc8569mds/mpc8569mds.c b/board/freescale/mpc8569mds/mpc8569mds.c
index cf5d8a5..18e0d87 100644
--- a/board/freescale/mpc8569mds/mpc8569mds.c
+++ b/board/freescale/mpc8569mds/mpc8569mds.c
@@ -7,6 +7,7 @@
 
 #include <common.h>
 #include <console.h>
+#include <flash.h>
 #include <hwconfig.h>
 #include <init.h>
 #include <pci.h>