ARM: 8246/2: pcmcia: sa1111: provide device clock

Both pxa2xx (long ago) and sa1100 (now) make use of clock device to get
the cpu speed. Make sa1111 glue code provide clock to platform layer.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>