utils: codegen: gen-formats.py: Use jinja

Currently the gen-formats.py script can only be used to generate C++
code because it hard-codes part of the template. Use jinja to fully
remove any such dependency.

Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

include/libcamera/formats.h.in

@@ -35,7 +35,9 @@ constexpr uint64_t __mod(unsigned int vendor, unsigned int mod)
 
 } /* namespace */
 
-${formats}
+{% for f in formats -%}
+constexpr PixelFormat {{f.name}}(__fourcc({{f.fourcc}}), __mod({{f.mod}}));
+{% endfor %}
 
 } /* namespace formats */