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>
diff --git a/arch/sh/lib/time.c b/arch/sh/lib/time.c
index 6273f39..0f31271 100644
--- a/arch/sh/lib/time.c
+++ b/arch/sh/lib/time.c
@@ -22,7 +22,7 @@
 
 unsigned long get_tbclk(void)
 {
-	return get_tmu0_clk_rate() >> 2;
+	return CONFIG_SH_TMU_CLK_FREQ / 4;
 }
 
 unsigned long timer_read_counter(void)
diff --git a/include/sh_tmu.h b/include/sh_tmu.h
index aa60c98..70aca21 100644
--- a/include/sh_tmu.h
+++ b/include/sh_tmu.h
@@ -67,9 +67,4 @@
 };
 #endif /* CONFIG_CPU_SH4 */
 
-static inline unsigned long get_tmu0_clk_rate(void)
-{
-	return CONFIG_SH_TMU_CLK_FREQ;
-}
-
 #endif	/* __SH_TMU_H */