clk: ux500: Staticize ux500_twocell_get

ux500_twocell_get is a local symbol.

Signed-off-by: Sachin Kamat <[e-mail]>
Acked-by: Lee Jones <[e-mail]>
Acked-by: Ulf Hansson <[e-mail]>
Signed-off-by: Mike Turquette <[e-mail]>

drivers/clk/ux500/u8500_of_clk.c

···
 #define PRCC_KCLK_STORE(clk, base, bit)        \
 	prcc_kclk[(base * PRCC_PERIPHS_PER_CLUSTER) + bit] = clk
 
-struct clk *ux500_twocell_get(struct of_phandle_args *clkspec, void *data)
+static struct clk *ux500_twocell_get(struct of_phandle_args *clkspec,
+				     void *data)
 {
 	struct clk **clk_data = data;
 	unsigned int base, bit;