media: imx.rst: Specify the sabreauto variant

Improve the documentation by specifying that the instructions
are related to the i.MX6Q sabreauto variant.

This avoids confusion if someone follows these steps on a i.MX6DL
sabreauto, which has different numbering on the I2C bus and
I2C muxes.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

Documentation/media/v4l-drivers/imx.rst

@@ -515,10 +515,10 @@ Streaming can then begin independently on the capture device nodes
 be used to select any supported YUV pixelformat on the capture device
 nodes, including planar.
 
-SabreAuto with ADV7180 decoder
-------------------------------
+i.MX6Q SabreAuto with ADV7180 decoder
+-------------------------------------
 
-On the SabreAuto, an on-board ADV7180 SD decoder is connected to the
+On the i.MX6Q SabreAuto, an on-board ADV7180 SD decoder is connected to the
 parallel bus input on the internal video mux to IPU1 CSI0.
 
 The following example configures a pipeline to capture from the ADV7180