media: staging/imx: add i.MX7 entries to TODO file

Add some i.MX7 related entries to TODO file.
Signed-off-by: NRui Miguel Silva <rui.silva@linaro.org>
Acked-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/staging/media/imx/TODO

@@ -45,3 +45,12 @@
 
      Which means a port must not contain mixed-use endpoints, they
      must all refer to media links between V4L2 subdevices.
+
+- i.MX7: all of the above, since it uses the imx media core
+
+- i.MX7: use Frame Interval Monitor
+
+- i.MX7: runtime testing with parallel sensor, links setup and streaming
+
+- i.MX7: runtime testing with different formats, for the time only 10-bit bayer
+  is tested