linux-imx

[media] media: Use entity enums in graph walk

This will also mean that the necessary graph related data structures will
be allocated dynamically, removing the need for maximum ID checks.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>