sh: clkfwk: fixup unsed variable warning

This patch solves above warning

${LINUX}/drivers/sh/clk/cpg.c:404:6: warning: \
unused variable 'val' [-Wunused-variable]

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
diff --git a/drivers/sh/clk/cpg.c b/drivers/sh/clk/cpg.c
index b3dc441..5aedcdf 100644
--- a/drivers/sh/clk/cpg.c
+++ b/drivers/sh/clk/cpg.c
@@ -401,7 +401,6 @@
 
 static int fsidiv_set_rate(struct clk *clk, unsigned long rate)
 {
-	u32 val;
 	int idx;
 
 	idx = (clk->parent->rate / rate) & 0xffff;