drivers: Fix boot problem on SuperH

SuperH images crash too eearly to display any console output. Bisect
points to commit 507fd01d ("drivers: move the early platform device
support to arch/sh"). An analysis of that patch suggests that
early_platform_cleanup() is now called at the wrong time. Restoring its
call point fixes the problem.

Cc: Bartosz Golaszewski <brgl@bgdev.pl>
Fixes: 507fd01d

 ("drivers: move the early platform device support to arch/sh")
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Rob Landley <rob@landley.net>
Link: https://lore.kernel.org/r/20191203205852.15659-1-linux@roeck-us.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>