do_mounts: only enable PARTUUID for CONFIG_BLOCK

When CONFIG_BLOCK is not enabled:

init/do_mounts.c:71: error: implicit declaration of function 'dev_to_part'
init/do_mounts.c:71: warning: initialization makes pointer from integer without a cast
init/do_mounts.c:73: error: dereferencing pointer to incomplete type
init/do_mounts.c:76: error: dereferencing pointer to incomplete type
init/do_mounts.c:76: error: dereferencing pointer to incomplete type
init/do_mounts.c:102: error: implicit declaration of function 'part_pack_uuid'
init/do_mounts.c:104: error: 'block_class' undeclared (first use in this function)

Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

init/do_mounts.c

@@ -58,6 +58,7 @@ static int __init readwrite(char *str)
 __setup("ro", readonly);
 __setup("rw", readwrite);
 
+#ifdef CONFIG_BLOCK
 /**
  * match_dev_by_uuid - callback for finding a partition using its uuid
  * @dev:	device passed in by the caller
@@ -111,6 +112,7 @@ static dev_t __init devt_from_partuuid(char *uuid_str)
 done:
 	return res;
 }
+#endif
 
 /*
  *	Convert a name into device number.  We accept the following variants:
@@ -138,6 +140,7 @@ dev_t name_to_dev_t(char *name)
 	dev_t res = 0;
 	int part;
 
+#ifdef CONFIG_BLOCK
 	if (strncmp(name, "PARTUUID=", 9) == 0) {
 		name += 9;
 		if (strlen(name) != 36)
@@ -147,6 +150,7 @@ dev_t name_to_dev_t(char *name)
 			goto fail;
 		goto done;
 	}
+#endif
 
 	if (strncmp(name, "/dev/", 5) != 0) {
 		unsigned maj, min;