[media] vivid: add missing includes

Fix kbuild test robot warnings about missing vmalloc.h and string.h
includes.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/platform/vivid/vivid-core.c

@@ -23,6 +23,7 @@
 #include <linux/init.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
+#include <linux/vmalloc.h>
 #include <linux/font.h>
 #include <linux/mutex.h>
 #include <linux/videodev2.h>

drivers/media/platform/vivid/vivid-rds-gen.c

@@ -19,6 +19,7 @@
 
 #include <linux/kernel.h>
 #include <linux/ktime.h>
+#include <linux/string.h>
 #include <linux/videodev2.h>
 
 #include "vivid-rds-gen.h"

drivers/media/platform/vivid/vivid-tpg.h

@@ -25,6 +25,7 @@
 #include <linux/errno.h>
 #include <linux/random.h>
 #include <linux/slab.h>
+#include <linux/vmalloc.h>
 #include <linux/videodev2.h>
 
 #include "vivid-tpg-colors.h"

drivers/media/platform/vivid/vivid-vbi-gen.c

@@ -20,6 +20,7 @@
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/ktime.h>
+#include <linux/string.h>
 #include <linux/videodev2.h>
 
 #include "vivid-vbi-gen.h"

drivers/media/platform/vivid/vivid-vid-cap.c

@@ -20,6 +20,7 @@
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
+#include <linux/vmalloc.h>
 #include <linux/videodev2.h>
 #include <linux/v4l2-dv-timings.h>
 #include <media/v4l2-common.h>