[ARM] 4936/1: [CSB337] Converts to new-style UART initialization

Converts the CSB337 target to the new UART initialization API.

Signed-off-by: Bill Gatliff <bgat@billgatliff.com>
Acked-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>