mcumgr: img_mgmt: Fix minor issues

Fix a few typos inside img_mgmt.c file.

Signed-off-by: Tomasz Chyrowicz <tomasz.chyrowicz@nordicsemi.no>

Author: tomchy

subsys/mgmt/mcumgr/grp/img_mgmt/src/img_mgmt.c

@@ -173,7 +173,7 @@ static bool img_mgmt_slot_max_size(size_t *area_sizes, zcbor_state_t *zse)
 
 	ARG_UNUSED(area_sizes);
 
-	rc = blinfo_lookup(BLINFO_MAX_APPLICATION_SIZE, &max_app_size, sizeof(max_app_size))
+	rc = blinfo_lookup(BLINFO_MAX_APPLICATION_SIZE, &max_app_size, sizeof(max_app_size));
 
 	if (rc < 0) {
 		LOG_ERR("Failed to lookup max application size: %d", rc);
@@ -626,7 +626,7 @@ static int img_mgmt_slot_info(struct smp_streamer *ctxt)
 			}
 
 #if defined(CONFIG_MCUMGR_GRP_IMG_TOO_LARGE_SYSBUILD) || \
-	defined(MCUMGR_GRP_IMG_TOO_LARGE_BOOTLOADER_INFO)
+	defined(CONFIG_MCUMGR_GRP_IMG_TOO_LARGE_BOOTLOADER_INFO)
 			ok = img_mgmt_slot_max_size(area_sizes, zse);
 
 			if (!ok) {