include: add missing sys/printk.h include

Some files were using the printk API without including sys/printk.h

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>

samples/application_development/out_of_tree_driver/hello_world_module/zephyr/hello_world_driver.c

@@ -6,6 +6,7 @@
 
 #include "hello_world_driver.h"
 #include <zephyr/types.h>
+#include <zephyr/sys/printk.h>
 #include <zephyr/syscall_handler.h>
 
 /**

samples/shields/x_nucleo_53l0a1/src/display_7seg.c

@@ -8,6 +8,7 @@
 
 #include <zephyr/device.h>
 #include <zephyr/drivers/gpio.h>
+#include <zephyr/sys/printk.h>
 
 const uint8_t DISPLAY_OFF[4] = { CHAR_OFF, CHAR_OFF, CHAR_OFF, CHAR_OFF };
 const uint8_t TEXT_Err[4] = { CHAR_E, CHAR_r, CHAR_r, CHAR_OFF };

subsys/mgmt/hawkbit/hawkbit_firmware.c

@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 #include <zephyr/storage/flash_map.h>
+#include <zephyr/sys/printk.h>
 
 #include "hawkbit_firmware.h"
 

subsys/mgmt/updatehub/updatehub_firmware.c

@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#include <zephyr/sys/printk.h>
 #include <zephyr/storage/flash_map.h>
 
 #include "updatehub_firmware.h"