libcamera: ipa_module: add path getter

Add a method to IPAModule to get the path of the IPA module shared
object that the IPAModule was constructed from.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/libcamera/include/ipa_module.h

@@ -26,6 +26,7 @@ public:
 	bool isValid() const;
 
 	const struct IPAModuleInfo &info() const;
+	const std::string &path() const;
 
 	bool load();