video/logo: add a type parameter to the logo makefile function

video/logo: add a type parameter to the logo makefile function

When translating a portable pixmap file into a .c file, the pnmtologo
tool expects to receive the image type (either mono, vga16 or clut224)
as an argument under the -t option.

Currently, this information is stored in the file name. Because we
will allow for custom logo in an upcoming change, it is preferable to
decouple the image name from its type.

Add a new $2 parameter to the Makefile logo function which contains
the image type.

Update all the individual targets to provide this new argument.

Signed-off-by: Vincent Mailhol <mailhol@kernel.org>
Signed-off-by: Helge Deller <deller@gmx.de>