[PATCH][MIPS] add mips_hpt_frequency check to mips_clockevent_init()

[Yoichi Yuasa <yoichi_yuasa@xxxxxxxxxxxxxx>]

Add mips_hpt_frequency check to mips_clockevent_init().

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@xxxxxxxxxxxxxx>

diff -pruN -X mips/Documentation/dontdiff mips-orig/arch/mips/kernel/cevt-r4k.c mips/arch/mips/kernel/cevt-r4k.c
--- mips-orig/arch/mips/kernel/cevt-r4k.c	2007-10-21 12:44:50.113477500 +0900
+++ mips/arch/mips/kernel/cevt-r4k.c	2007-10-21 12:49:09.177668000 +0900
@@ -220,7 +220,7 @@ void __cpuinit mips_clockevent_init(void
 	struct clock_event_device *cd;
 	unsigned int irq = MIPS_CPU_IRQ_BASE + 7;
 
-	if (!cpu_has_counter)
+	if (!cpu_has_counter || !mips_hpt_frequency)
 		return;
 
 #ifdef CONFIG_MIPS_MT_SMTC