platform: nordic_nrf: Add missing include

Fix warning induced by missing include.

Change-Id: I27a429dfbc8f1c2c926da2089bffd7e81363276a
Signed-off-by: Markus Lassila <[email protected]>
(cherry picked from commit 21ff86a)

Author: MarkusLassila

platform/ext/target/nordic_nrf/common/core/target_cfg.c

@@ -20,6 +20,7 @@
 #include "region_defs.h"
 #include "tfm_plat_defs.h"
 #include "tfm_peripherals_config.h"
+#include "tfm_plat_provisioning.h"
 #include "region.h"
 #include "array.h"