arm: omap: fix section mismatch warning

WARNING: arch/arm/plat-omap/built-in.o(.data+0x6d4): Section mismatch in reference from the variable omap_driver to the function .init.text:omap_cpu_init()
The variable omap_driver references
the function __init omap_cpu_init()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console,
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/plat-omap/cpu-omap.c

@@ -101,7 +101,7 @@ static int omap_target(struct cpufreq_policy *policy,
 	return ret;
 }
 
-static int __init omap_cpu_init(struct cpufreq_policy *policy)
+static int __cpuinit omap_cpu_init(struct cpufreq_policy *policy)
 {
 	int result = 0;