media: rcar-vin: Fix YUYV8_1X16 handling for CSI-2

The YUYV8_1X16 and UYVY8_1X16 formats are treated as 'ITU-R
BT.601/BT.1358 16-bit YCbCr-422 input' (YUV16 - 0x5) in the R-Car VIN
driver and are thus disallowed when capturing frames from the R-Car
CSI-2 interface according to the hardware manual.

As the 1X16 format variants are meant to be used with serial busses they
have to be treated as 'YCbCr-422 8-bit data input' (0x1) when capturing
from CSI-2, which is a valid setting for CSI-2.

Commit 78b3f9d75a62 ("media: rcar-vin: Add check that input interface
and format are valid") disallowed capturing YUV16 when using the CSI-2
interface. Fix this by using YUV8_BT601 for YCbCr422 when CSI-2 is in
use.

Fixes: 78b3f9d75a62 ("media: rcar-vin: Add check that input interface and format are valid")
Signed-off-by: Jacopo Mondi <[email protected]>
Reviewed-by: Laurent Pinchart <[email protected]>
Reviewed-by: Niklas Söderlund <[email protected]>
Tested-by: Niklas Söderlund <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Laurent Pinchart <[email protected]>

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