ipa: ipu3: Tidy-up includes

Tidy-up a bit the inclusions directive in the IPU3 IPA module.

In detail:
- ipu3.cpp is missing inclusions for:
  std::abs from <cmath>
  std::map from <map>
  std::min/max from <algorithm>
  std::numeric_limits from <limits>
  std::unique_ptr from <memory>
  std::vector from <vector>

  and does not require <sys/mman.h>

- ipu3_agc has two not used inclusions in the header file and one the cpp file
  and is missing <chrono> for std::literals::chrono_literals

- ipu3_awb is missing <algorithm> for std::sort and does not use
  <numeric> or <unordered_map>

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

src/ipa/ipu3/ipu3.cpp

@@ -5,9 +5,15 @@
  * ipu3.cpp - IPU3 Image Processing Algorithms
  */
 
+#include <algorithm>
 #include <array>
+#include <cmath>
+#include <limits>
+#include <map>
+#include <memory>
 #include <stdint.h>
 #include <utility>
+#include <vector>
 
 #include <linux/intel-ipu3.h>
 #include <linux/v4l2-controls.h>

src/ipa/ipu3/ipu3_agc.cpp

@@ -8,8 +8,8 @@
 #include "ipu3_agc.h"
 
 #include <algorithm>
+#include <chrono>
 #include <cmath>
-#include <numeric>
 
 #include <libcamera/base/log.h>
 

src/ipa/ipu3/ipu3_agc.h

@@ -7,9 +7,6 @@
 #ifndef __LIBCAMERA_IPU3_AGC_H__
 #define __LIBCAMERA_IPU3_AGC_H__
 
-#include <array>
-#include <unordered_map>
-
 #include <linux/intel-ipu3.h>
 
 #include <libcamera/base/utils.h>

src/ipa/ipu3/ipu3_awb.cpp

@@ -6,9 +6,8 @@
  */
 #include "ipu3_awb.h"
 
+#include <algorithm>
 #include <cmath>
-#include <numeric>
-#include <unordered_map>
 
 #include <libcamera/base/log.h>