Having no license specification in a module taints the kernel during load
with:

        arm_big_little: module license 'unspecified' taints kernel.

and also the linker doesn't allow it to make use of GPL-exported symbols
which in this case also results in errors like:

        arm_big_little: Unknown symbol cpufreq_register_driver (err 0)

. The header of the driver specifies a GPL v2 license, so note that
accordingly. While at it also add a description and an author and fix
the license in a companion file to explicit v2.

Reported-by: Andreas Schwab <redacted>
Signed-off-by: Uwe Kleine-K?nig <redacted>
---
 drivers/cpufreq/arm_big_little.c    | 4 ++++
 drivers/cpufreq/arm_big_little_dt.c | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/cpufreq/arm_big_little.c b/drivers/cpufreq/arm_big_little.c
index 1f4d4e315057..b600f3107bef 100644
--- a/drivers/cpufreq/arm_big_little.c
+++ b/drivers/cpufreq/arm_big_little.c

@@ -593,3 +593,7 @@ void bL_cpufreq_unregister(struct cpufreq_arm_bL_ops *ops)
        arm_bL_ops = NULL;
 }
 EXPORT_SYMBOL_GPL(bL_cpufreq_unregister);
+
+MODULE_AUTHOR("Viresh Kumar <viresh.kumar@linaro.org>");
+MODULE_DESCRIPTION("Generic ARM big LITTLE cpufreq driver");
+MODULE_LICENSE("GPL v2");

diff --git a/drivers/cpufreq/arm_big_little_dt.c b/drivers/cpufreq/arm_big_little_dt.c
index 8d9d59108906..4550f6976768 100644
--- a/drivers/cpufreq/arm_big_little_dt.c
+++ b/drivers/cpufreq/arm_big_little_dt.c

@@ -114,4 +114,4 @@ module_platform_driver(generic_bL_platdrv);

 MODULE_AUTHOR("Viresh Kumar <viresh.kumar@linaro.org>");
 MODULE_DESCRIPTION("Generic ARM big LITTLE cpufreq driver via DT");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");