media: intel/ipu6: explicitly include vmalloc.h

linux/vmalloc.h needs to be included explicitly nowadays. Do it.

Link: https://lore.kernel.org/linux-media/20240507123528.932421-1-sakari.ailus@linux.intel.com
Fixes: 9163d835 ("media: intel/ipu6: add IPU6 DMA mapping API and MMU table")
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/pci/intel/ipu6/ipu6-mmu.c

@@ -22,6 +22,7 @@
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/types.h>
+#include <linux/vmalloc.h>
 
 #include "ipu6.h"
 #include "ipu6-dma.h"