media: atomisp: Make two individual enum to define the MIPI format

The original mipi_format_t represents the MIPI format settings for both
atomisp with the same name and the enum member was controlled by #if
defined(ISP2401). However, if we want to make this driver generic, this
enum should be individually defined for them.

Since the format type is redefined, the format setting function
ia_css_isys_set_fmt_type() should be reworked for ISP2400 and ISP2401
called ia_css_isys_2400_set_fmt_type() and ia_css_isys_2401_set_fmt_type()
.

Additionally, the function called is_mipi_format_yuv420() isn't used by any
functions so it can be removed.

Link: https://lore.kernel.org/r/20230713100231.308923-3-hpa@redhat.com



Signed-off-by: Kate Hsuan <hpa@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>