PM / devfreq: Move exynos4 devfreq driver into a new sub-directory

In anticipation of the new exynos5 devfreq and ppmu driver, create
an exynos sub-directory. Move the existing exynos4 devfreq driver
into the same.

Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Cc: Jonghwan Choi <jhbird.choi@samsung.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/drivers/devfreq/Makefile b/drivers/devfreq/Makefile
index 8c46423..3bc1fef 100644
--- a/drivers/devfreq/Makefile
+++ b/drivers/devfreq/Makefile
@@ -5,4 +5,4 @@
 obj-$(CONFIG_DEVFREQ_GOV_USERSPACE)	+= governor_userspace.o
 
 # DEVFREQ Drivers
-obj-$(CONFIG_ARM_EXYNOS4_BUS_DEVFREQ)	+= exynos4_bus.o
+obj-$(CONFIG_ARM_EXYNOS4_BUS_DEVFREQ)	+= exynos/
diff --git a/drivers/devfreq/exynos/Makefile b/drivers/devfreq/exynos/Makefile
new file mode 100644
index 0000000..1498823
--- /dev/null
+++ b/drivers/devfreq/exynos/Makefile
@@ -0,0 +1,2 @@
+# Exynos DEVFREQ Drivers
+obj-$(CONFIG_ARM_EXYNOS4_BUS_DEVFREQ)	+= exynos4_bus.o
diff --git a/drivers/devfreq/exynos4_bus.c b/drivers/devfreq/exynos/exynos4_bus.c
similarity index 100%
rename from drivers/devfreq/exynos4_bus.c
rename to drivers/devfreq/exynos/exynos4_bus.c