kernel: Add missing includes mtdsplit_*.c

This fixes the following compile problem with kernel 4.9 on lantiq:
drivers/mtd/mtdsplit/mtdsplit_uimage.c:244:34: error: array type has incomplete element type 'struct of_device_id'
 static const struct of_device_id mtdsplit_uimage_of_match_table[] = {
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/mtd/mtdsplit/mtdsplit_uimage.c:245:4: error: field name not in record or union initializer
  { .compatible = "denx,uimage" },

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_eva.c

@@ -15,6 +15,7 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
 #include <linux/byteorder/generic.h>
+#include <linux/of.h>
 
 #include "mtdsplit.h"
 

target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_jimage.c

@@ -20,6 +20,7 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
 #include <linux/byteorder/generic.h>
+#include <linux/of.h>
 
 #include "mtdsplit.h"
 

target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_lzma.c

@@ -13,6 +13,7 @@
 #include <linux/slab.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
+#include <linux/of.h>
 
 #include <asm/unaligned.h>
 

target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_minor.c

@@ -27,6 +27,7 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
 #include <linux/string.h>
+#include <linux/of.h>
 
 #include "mtdsplit.h"
 

target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_seama.c

@@ -14,6 +14,7 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
 #include <linux/byteorder/generic.h>
+#include <linux/of.h>
 
 #include "mtdsplit.h"
 

target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_tplink.c

@@ -15,6 +15,7 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
 #include <linux/byteorder/generic.h>
+#include <linux/of.h>
 
 #include "mtdsplit.h"
 

target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_trx.c

@@ -17,6 +17,7 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
 #include <linux/byteorder/generic.h>
+#include <linux/of.h>
 
 #include "mtdsplit.h"
 

target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_uimage.c

@@ -18,6 +18,7 @@
 #include <linux/mtd/partitions.h>
 #include <linux/version.h>
 #include <linux/byteorder/generic.h>
+#include <linux/of.h>
 
 #include "mtdsplit.h"
 

target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_wrgg.c

@@ -16,6 +16,7 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
 #include <linux/byteorder/generic.h>
+#include <linux/of.h>
 
 #include "mtdsplit.h"