devfreq: Remove MODULE_ALIAS for exynos4 busfreq driver

This driver can only be built-in, it does not make sense to add modalias for
it (in addition to being incorrect, the platform modalias needs to be prefixed
with "platform:").

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
diff --git a/drivers/devfreq/exynos4_bus.c b/drivers/devfreq/exynos4_bus.c
index 489ccfa..590d686 100644
--- a/drivers/devfreq/exynos4_bus.c
+++ b/drivers/devfreq/exynos4_bus.c
@@ -1124,4 +1124,3 @@
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("EXYNOS4 busfreq driver with devfreq framework");
 MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
-MODULE_ALIAS("exynos4-busfreq");