socfpga: Adding Clock Manager driver

Clock Manager driver will be called to reconfigure all the
clocks setting based on user input. The input are passed to
Preloader through handoff files

Signed-off-by: Chin Liang See <clsee@altera.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Tom Rini <trini@ti.com>
Cc: Wolfgang Denk <wd@denx.de>
CC: Pavel Machek <pavel@denx.de>
Cc: Dinh Nguyen <dinguyen@altera.com>
Acked-by: Pavel Machek <pavel@denx.de>

include/configs/socfpga_cyclone5.h

@@ -8,6 +8,7 @@
 
 #include <asm/arch/socfpga_base_addrs.h>
 #include "../../board/altera/socfpga/pinmux_config.h"
+#include "../../board/altera/socfpga/pll_config.h"
 
 /*
  * High level configuration