[ARM] Kirkwood: Add support for QNAP TS-119/TS-219 Turbo NAS

Add support for the QNAP TS-119 and TS-219 Turbo NAS devices.

Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
diff --git a/arch/arm/mach-kirkwood/common.h b/arch/arm/mach-kirkwood/common.h
index c66a250..6ee8840 100644
--- a/arch/arm/mach-kirkwood/common.h
+++ b/arch/arm/mach-kirkwood/common.h
@@ -41,6 +41,7 @@
 void kirkwood_uart0_init(void);
 void kirkwood_uart1_init(void);
 
+extern int kirkwood_tclk;
 extern struct sys_timer kirkwood_timer;