libcamera: ipa: Move IPA control serialization structures to libcamera namespace

The C structures used to serialize controls are currently defined in the
root namespace, which places them at the root level in the class list
generated by Doxygen. Move them to the libcamera namespace to fix that.

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

include/libcamera/ipa/ipa_controls.h

@@ -10,6 +10,8 @@
 #include <stdint.h>
 
 #ifdef __cplusplus
+namespace libcamera {
+
 extern "C" {
 #endif
 
@@ -48,5 +50,7 @@ struct ipa_control_info_entry {
 };
 
 #ifdef __cplusplus
+} /* namespace libcamera */
+
 }
 #endif