As reported by @kuanyili on Github, commit 3564c22e46d5 broke CI build:
3564c22e46 (commitcomment-91091149)
Adding back those symbols fixes the problem.
Fixes: 3564c22e46d5 ("bcm27xx: disable duplicate sdhost driver")
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>