soc: mediatek: Move power-domain drivers to the genpd dir

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

Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Cc: <linux-mediatek@lists.infradead.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/genpd/Makefile

@@ -3,3 +3,4 @@ obj-y					+= actions/
 obj-y					+= amlogic/
 obj-y					+= apple/
 obj-y					+= bcm/
+obj-y					+= mediatek/

drivers/genpd/mediatek/Makefile

+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_MTK_SCPSYS)		+= mtk-scpsys.o
+obj-$(CONFIG_MTK_SCPSYS_PM_DOMAINS) 	+= mtk-pm-domains.o

drivers/soc/mediatek/Makefile

@@ -4,8 +4,6 @@ obj-$(CONFIG_MTK_DEVAPC) += mtk-devapc.o
 obj-$(CONFIG_MTK_INFRACFG) += mtk-infracfg.o
 obj-$(CONFIG_MTK_PMIC_WRAP) += mtk-pmic-wrap.o
 obj-$(CONFIG_MTK_REGULATOR_COUPLER) += mtk-regulator-coupler.o
-obj-$(CONFIG_MTK_SCPSYS) += mtk-scpsys.o
-obj-$(CONFIG_MTK_SCPSYS_PM_DOMAINS) += mtk-pm-domains.o
 obj-$(CONFIG_MTK_MMSYS) += mtk-mmsys.o
 obj-$(CONFIG_MTK_MMSYS) += mtk-mutex.o
 obj-$(CONFIG_MTK_SVS) += mtk-svs.o