test: sandbox: fix link error with do_ut_bootm if BLOBLIST=n

Having CONFIG_OF_EMBED=y && CONFIG_BLOBLIST=n leads to the link
error:
```
ld: /tmp/ccwtRVty.ltrans28.ltrans.o:(.data.rel+0x4e8): undefined \
                                            reference to `do_ut_bootm'
```

Fixes: fe158657a5 ("test: inconsistent bootm tests")
Signed-off-by: Evgeny Bachinin <EABachinin@salutedevices.com>

test/cmd_ut.c

@@ -107,9 +107,9 @@ static struct cmd_tbl cmd_ut_sub[] = {
 #if CONFIG_IS_ENABLED(BLOBLIST)
 	U_BOOT_CMD_MKENT(bloblist, CONFIG_SYS_MAXARGS, 1, do_ut_bloblist,
 			 "", ""),
-#endif
 	U_BOOT_CMD_MKENT(bootm, CONFIG_SYS_MAXARGS, 1, do_ut_bootm, "", ""),
 #endif
+#endif
 #ifdef CONFIG_CMD_ADDRMAP
 	U_BOOT_CMD_MKENT(addrmap, CONFIG_SYS_MAXARGS, 1, do_ut_addrmap, "", ""),
 #endif