ipa: raspberrypi: Pass lens shading table through configure() function

The IPAInterface::configure() function now accepts custom configuration
data. Use it to pass the lens shading table instead of using a custom
IPA event. This will allow starting the IPA when starting the camera,
instead of pre-starting it early in order to process the lens shading
table allocation event.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>

include/libcamera/ipa/raspberrypi.h

@@ -10,6 +10,10 @@
 #include <libcamera/control_ids.h>
 #include <libcamera/controls.h>
 
+enum RPiConfigParameters {
+	RPI_IPA_CONFIG_LS_TABLE = (1 << 0),
+};
+
 enum RPiOperations {
 	RPI_IPA_ACTION_V4L2_SET_STAGGERED = 1,
 	RPI_IPA_ACTION_V4L2_SET_ISP,
@@ -21,7 +25,6 @@ enum RPiOperations {
 	RPI_IPA_EVENT_SIGNAL_STAT_READY,
 	RPI_IPA_EVENT_SIGNAL_ISP_PREPARE,
 	RPI_IPA_EVENT_QUEUE_REQUEST,
-	RPI_IPA_EVENT_LS_TABLE_ALLOCATION,
 };
 
 enum RPiIpaMask {