ipa: ipu3: Add the functions to the Algorithm class

Introduce three functions in the Algorithm class to manage algorithms:
- configure which is called when IPA is configured only
- prepare called on EventFillParams event at each frame when the request
is queued
- process called on EventStatReady event at each frame completion when
the statistics have been generated.

The existing AGC implementation already has a function named process(),
though it has different arguments. Adding the new virtual process()
interface causes a compiler warning due to the AGC implementation
overloading a virtual function, even though the overload can be resolved
correctly.

Temporarily disable the warning in this commit to maintain bisection
until the AGC is converted to the new interface.

Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

meson.build

@@ -108,6 +108,10 @@ if cc.has_argument('-Wno-c99-designator')
     ]
 endif
 
+# Do not warn when a function declaration hides virtual functions from
+# a base class
+cpp_arguments += '-Wno-overloaded-virtual'
+
 c_arguments += common_arguments
 cpp_arguments += common_arguments