ARM: Orion5x: ts78xx: allow rtc-m48t86 to manage it's own resources

The rtc-m48t86 driver can now handle it's own resources and do the
read/write operations internally.

Pass the necessary resources to the driver and remove the m48t86_ops
platform data.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-By: Alexander Clouter <alex+kernel@digriz.org.uk>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>