bl2: mcuboot: fix build warning related to flash_map

Declare flash_area_sector_from_off() and flash_area_get_sector()
that where added in MCUBoot and declared in mainline TF-M repository
from commit 1329d18 ("BL2: Update MCUboot tag to v2.2.0-rc1")
nut not considered in the Zephyr TF-M 2.2.x branch when bumping to
MCUBoot 2.2.x in commit 969addd ("BL2: MCUboot: Use v2.2.0").

Signed-off-by: Etienne Carriere <etienne.carriere@st.com>

Author: etienne-lms

bl2/ext/mcuboot/include/flash_map/flash_map.h

@@ -165,6 +165,22 @@ uint32_t flash_area_align(const struct flash_area *area);
 int flash_area_get_sectors(int fa_id, uint32_t *count,
   struct flash_sector *sectors);
 
+/* Retrieve the flash sector a given offset belongs to.
+ *
+ * Returns 0 on success, or an error code on failure.
+ */
+int flash_area_sector_from_off(uint32_t off, struct flash_sector *sector);
+
+/* Retrieve the flash sector a given offset, within flash area.
+ *
+ * @param fa        flash area.
+ * @param off       offset of sector.
+ * @param sector    pointer to structure for obtained information.
+ * Returns 0 on success, or an error code on failure.
+ */
+int flash_area_get_sector(const struct flash_area *fa, uint32_t off,
+  struct flash_sector *sector);
+
 /*
  * Similar to flash_area_get_sectors(), but return the values in an
  * array of struct flash_area instead.