Core support of the Atmel SSC library for all Atmel AT91 processors.

Based on David Brownell's initial patch for the AT91RM9200.
Signed-off-by: NAndrew Victor <linux@maxim.org.za>
Acked-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>