sh: tmu: Inline get_tmu0_clk_rate()

This function just returns CONFIG_SH_TMU_CLK_FREQ, use the constant
directly instead.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>

arch/sh/lib/time.c

@@ -22,7 +22,7 @@ static struct tmu_regs *tmu = (struct tmu_regs *)TMU_BASE;
 
 unsigned long get_tbclk(void)
 {
-	return get_tmu0_clk_rate() >> 2;
+	return CONFIG_SH_TMU_CLK_FREQ / 4;
 }
 
 unsigned long timer_read_counter(void)

include/sh_tmu.h

@@ -67,9 +67,4 @@ struct tmu_regs {
 };
 #endif /* CONFIG_CPU_SH4 */
 
-static inline unsigned long get_tmu0_clk_rate(void)
-{
-	return CONFIG_SH_TMU_CLK_FREQ;
-}
-
 #endif	/* __SH_TMU_H */