[PATCH -next] media/platform/mtk-jpeg: add slab.h to fix build errors

[Randy Dunlap]

From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>

Include <linux/slab.h> to fix these build errors:

../drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c: In function 'mtk_jpeg_open':
../drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c:1017:2: error: implicit declaration of function 'kzalloc' [-Werror=implicit-function-declaration]
  ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
../drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c:1017:6: warning: assignment makes pointer from integer without a cast [enabled by default]
  ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
../drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c:1047:2: error: implicit declaration of function 'kfree' [-Werror=implicit-function-declaration]
  kfree(ctx);

Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Ming Hsiu Tsai <minghsiu.tsai@xxxxxxxxxxxx>
Cc: Rick Chang <rick.chang@xxxxxxxxxxxx>
Cc: Bin Liu <bin.liu@xxxxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
---
 drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c |    1 +
 1 file changed, 1 insertion(+)

--- linux-next-20170306.orig/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
+++ linux-next-20170306/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
@@ -22,6 +22,7 @@
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
+#include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <media/v4l2-event.h>
 #include <media/v4l2-mem2mem.h>