rbd: make const pointer spaces a static const array

Don't populate the const array spaces on the stack but make it static
const and make the pointer an array to remove a dereference. Shrinks
object code a little too.  Also clean up intent, currently it is spaces
and should be a tab.

Signed-off-by: Colin Ian King <colin.i.king@googlemail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

drivers/block/rbd.c

@@ -6191,7 +6191,7 @@ static inline size_t next_token(const char **buf)
         * These are the characters that produce nonzero for
         * isspace() in the "C" and "POSIX" locales.
         */
-        const char *spaces = " \f\n\r\t\v";
+	static const char spaces[] = " \f\n\r\t\v";
 
         *buf += strspn(*buf, spaces);	/* Find start of token */