soc: samsung: Move power-domain driver to the genpd dir

To simplify with maintenance let's move the samsung power-domain driver to
the new genpd directory. Going forward, patches are intended to be managed
through a separate git tree, according to MAINTAINERS.

Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: Alim Akhtar <alim.akhtar@samsung.com>
Cc: <linux-samsung-soc@vger.kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
diff --git a/drivers/genpd/Makefile b/drivers/genpd/Makefile
index c178421e..1cf0ff26 100644
--- a/drivers/genpd/Makefile
+++ b/drivers/genpd/Makefile
@@ -7,3 +7,4 @@
 obj-y					+= qcom/
 obj-y					+= renesas/
 obj-y					+= rockchip/
+obj-y					+= samsung/