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>