clk: ti: dra7: constify clk_hw_omap_ops structure

The clk_hw_omap_ops structures are never modified, so declare this one as
const, like the others.

Done with the help of Coccinelle.
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>

drivers/clk/ti/apll.c

@@ -323,7 +323,7 @@ static void omap2_apll_deny_idle(struct clk_hw_omap *clk)
 	omap2_apll_set_autoidle(clk, OMAP2_APLL_AUTOIDLE_DISABLE);
 }
 
-static struct clk_hw_omap_ops omap2_apll_hwops = {
+static const struct clk_hw_omap_ops omap2_apll_hwops = {
 	.allow_idle	= &omap2_apll_allow_idle,
 	.deny_idle	= &omap2_apll_deny_idle,
 };