fwu: mtd: remove unused argument from function call

The third argument passed to the function gen_image_alt_info() is not
used and is superfluous. Remove this unused argument from the function
call.

Fixes: 4898679e190 (FWU: Add FWU metadata access driver for MTD storage regions)
Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Tested-by: Michal Simek <michal.simek@amd.com>
diff --git a/lib/fwu_updates/fwu_mtd.c b/lib/fwu_updates/fwu_mtd.c
index 69cd3d7..d48de19 100644
--- a/lib/fwu_updates/fwu_mtd.c
+++ b/lib/fwu_updates/fwu_mtd.c
@@ -107,7 +107,7 @@
 	return fwu_mtd_get_alt_num(image_id, alt_num, "nor1");
 }
 
-static int gen_image_alt_info(char *buf, size_t len, int sidx,
+static int gen_image_alt_info(char *buf, size_t len,
 			      struct fwu_image_entry *img, struct mtd_info *mtd)
 {
 	char *p = buf, *end = buf + len;
@@ -168,8 +168,7 @@
 	}
 
 	for (i = 0; i < CONFIG_FWU_NUM_IMAGES_PER_BANK; i++) {
-		ret = gen_image_alt_info(buf, len, i * CONFIG_FWU_NUM_BANKS,
-					 &mdata.img_entry[i], mtd);
+		ret = gen_image_alt_info(buf, len, &mdata.img_entry[i], mtd);
 		if (ret)
 			break;