hash.c: Correct non-hash subcommand crc32 addr-save support

In the case of not having CONFIG_CMD_HASH but having CONFIG_CMD_CRC32
enabled (and not CONFIG_CRC32_VERIFY), we end up in this part of the
code path on hash_command().  However, we will only have exactly 3 args
here, and 3 > 3 is false, and we will not try and store the hash at the
address given as arg #3.  The next problem however is that we've been
moving argv around so the third value is now in argv[0] not argv[3].

Confirmed on AM335x Beaglebone White.
Signed-off-by: NTom Rini <trini@ti.com>

common/hash.c

@@ -325,8 +325,8 @@ int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag,
 		printf("CRC32 for %08lx ... %08lx ==> %08lx\n",
 				addr, addr + len - 1, crc);
 
-		if (argc > 3) {
-			ptr = (ulong *)simple_strtoul(argv[3], NULL, 16);
+		if (argc >= 3) {
+			ptr = (ulong *)simple_strtoul(argv[0], NULL, 16);
 			*ptr = crc;
 		}
 	}