ARM: at91: prepare common clk transition for sam9x5 SoCs

This patch encloses sam9x5 old clk registration in
"#if defined(CONFIG_OLD_CLK_AT91) #endif" sections.
Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/mach-at91/at91sam9x5.c

@@ -19,9 +19,10 @@
 #include "board.h"
 #include "soc.h"
 #include "generic.h"
-#include "clock.h"
 #include "sam9_smc.h"
 
+#if defined(CONFIG_OLD_CLK_AT91)
+#include "clock.h"
 /* --------------------------------------------------------------------
  *  Clocks
  * -------------------------------------------------------------------- */
@@ -313,6 +314,9 @@ static void __init at91sam9x5_register_clocks(void)
 	clk_register(&pck0);
 	clk_register(&pck1);
 }
+#else
+#define at91sam9x5_register_clocks	NULL
+#endif
 
 /* --------------------------------------------------------------------
  *  AT91SAM9x5 processor initialization