clk: at91: move clock code to compat.c

Move clock code to compat.c to allow switching to CCF
without mixing CCF code with non CCF code. This prepares the
field for next commits.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
diff --git a/drivers/clk/at91/Makefile b/drivers/clk/at91/Makefile
index 8c197ff..e2413af 100644
--- a/drivers/clk/at91/Makefile
+++ b/drivers/clk/at91/Makefile
@@ -2,11 +2,8 @@
 # Makefile for at91 specific clk
 #
 
-obj-y += pmc.o sckc.o
-obj-y += clk-slow.o clk-main.o clk-plla.o clk-plladiv.o clk-master.o
-obj-y += clk-system.o clk-peripheral.o
-
-obj-$(CONFIG_AT91_UTMI)		+= clk-utmi.o
-obj-$(CONFIG_AT91_USB_CLK)	+= clk-usb.o
-obj-$(CONFIG_AT91_H32MX)	+= clk-h32mx.o
-obj-$(CONFIG_AT91_GENERIC_CLK)	+= clk-generated.o
+ifdef CONFIG_CLK_CCF
+obj-y += pmc.o
+else
+obj-y += compat.o
+endif