drivers/cpufreq: Convert non-modular s5pv210-cpufreq.c to use builtin_platform_driver

This file depends on a Kconfig option which is a bool, so
we use the appropriate registration function, which avoids us
relying on an implicit inclusion of <module.h> which we are
doing currently.

While this currently works, we really don't want to be including
the module.h header in non-modular code, which we'd be forced
to do, pending some upcoming code relocation from init.h into
module.h.  So we fix it now by using the non-modular equivalent.

Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: linux-pm@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

drivers/cpufreq/s5pv210-cpufreq.c

@@ -659,4 +659,4 @@ static struct platform_driver s5pv210_cpufreq_platdrv = {
 	},
 	.probe = s5pv210_cpufreq_probe,
 };
-module_platform_driver(s5pv210_cpufreq_platdrv);
+builtin_platform_driver(s5pv210_cpufreq_platdrv);