shell: flash: display offsets properly

source/shell/flash.c

@@ -62,7 +62,7 @@ static void print_hex_ascii(uint32_t offset, const char *buf, size_t len)
 	for (; len; buf += n, len -= n) {
 		n = min(len, 16);
 
-		printf("%04" PRIx32 ": ", offset);
+		printf("%08" PRIx32 ": ", offset);
 
 		for (i = 0; i < 16; ++i) {
 			c = (i < n) ? buf[i] : 0;