cpufreq: SPEAr: Make read-only array sys_clk_src static

Don't populate the read-only array sys_clk_src on the stack but instead
make it static and add in a missing const. Also makes the object code a
little smaller.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/spear-cpufreq.c

@@ -39,7 +39,7 @@ static struct clk *spear1340_cpu_get_possible_parent(unsigned long newfreq)
 	 * In SPEAr1340, cpu clk's parent sys clk can take input from
 	 * following sources
 	 */
-	const char *sys_clk_src[] = {
+	static const char * const sys_clk_src[] = {
 		"sys_syn_clk",
 		"pll1_clk",
 		"pll2_clk",