ARM: at91: move at91rm9200 SoC to the CCF

This patch removes the selection of AT91_USE_OLD_CLK when selecting at91rm9200
SoC support. This will automatically enable COMMON_CLK_AT91 option and add
support for at91 common clk implementation.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 45b55e0..c818136 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -113,7 +113,6 @@
 	select HAVE_AT91_DBGU0
 	select MULTI_IRQ_HANDLER
 	select SPARSE_IRQ
-	select AT91_USE_OLD_CLK
 	select HAVE_AT91_USB_CLK
 
 config SOC_AT91SAM9260