arm: kirkwood: make it CONFIG_TIMER aware

If we switch to CONFIG_TIMER, we don't need the legacy timer macros and
functions anymore. Add the proper guards to exclude them from compiling.

Cc: Pali Rohár <pali@kernel.org>
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/arch/arm/mach-kirkwood/include/mach/config.h b/arch/arm/mach-kirkwood/include/mach/config.h
index 90e86ab..d877be1 100644
--- a/arch/arm/mach-kirkwood/include/mach/config.h
+++ b/arch/arm/mach-kirkwood/include/mach/config.h
@@ -51,8 +51,10 @@
 #endif /* CONFIG_IDE */
 
 /* Use common timer */
+#ifndef CONFIG_TIMER
 #define CONFIG_SYS_TIMER_COUNTS_DOWN
 #define CONFIG_SYS_TIMER_COUNTER	(MVEBU_TIMER_BASE + 0x14)
 #define CONFIG_SYS_TIMER_RATE		CONFIG_SYS_TCLK
+#endif
 
 #endif /* _KW_CONFIG_H */