sh: timer: Remove static global variable

"static u16 bit" is not necessary to use this as static global variable.
This patch fixes this.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

arch/sh/lib/time.c

@@ -21,13 +21,13 @@
 
 static struct tmu_regs *tmu = (struct tmu_regs *)TMU_BASE;
 
-static u16 bit;
 static unsigned long last_tcnt;
 static unsigned long long overflow_ticks;
 
 unsigned long get_tbclk(void)
 {
-	return get_tmu0_clk_rate() >> ((bit + 1) * 2);
+	u16 tmu_bit = (ffs(CONFIG_SYS_TMU_CLK_DIV) >> 1) - 1;
+	return get_tmu0_clk_rate() >> ((tmu_bit + 1) * 2);
 }
 
 static inline unsigned long long tick_to_time(unsigned long long tick)
@@ -62,8 +62,8 @@ static void tmu_timer_stop(unsigned int timer)
 
 int timer_init(void)
 {
-	bit = (ffs(CONFIG_SYS_TMU_CLK_DIV) >> 1) - 1;
-	writew((readw(&tmu->tcr0) & ~TCR_TPSC) | bit, &tmu->tcr0);
+	u16 tmu_bit = (ffs(CONFIG_SYS_TMU_CLK_DIV) >> 1) - 1;
+	writew((readw(&tmu->tcr0) & ~TCR_TPSC) | tmu_bit, &tmu->tcr0);
 
 	tmu_timer_stop(0);
 	tmu_timer_start(0);