media: v4l2-ioctl.c: Unify YCbCr/YUV terms in format descriptions

Format descriptions use YCbCr and YUV terms interchangeably. Let's unify
them so they all use YUV. While YCbCr is actually correct term here, YUV
is shorter and thus it also fixes too long description of P010 tiled
format.

Fixes: 3c8e19d3 ("media: Add P010 tiled format")
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>