pmdomain: sunxi: Move Kconfig option to the pmdomain subsystem

The Kconfig option belongs closer to the corresponding implementation,
hence let's move it from the soc subsystem to the pmdomain subsystem.

Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Cc: Samuel Holland <samuel@sholland.org>
Cc: <linux-sunxi@lists.linux.dev>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/pmdomain/Kconfig

@@ -13,5 +13,6 @@ source "drivers/pmdomain/rockchip/Kconfig"
 source "drivers/pmdomain/samsung/Kconfig"
 source "drivers/pmdomain/st/Kconfig"
 source "drivers/pmdomain/starfive/Kconfig"
+source "drivers/pmdomain/sunxi/Kconfig"
 
 endmenu

drivers/pmdomain/sunxi/Kconfig

+# SPDX-License-Identifier: GPL-2.0-only
+
+config SUN20I_PPU
+	bool "Allwinner D1 PPU power domain driver"
+	depends on ARCH_SUNXI || COMPILE_TEST
+	depends on PM
+	select PM_GENERIC_DOMAINS
+	help
+	  Say y to enable the PPU power domain driver. This saves power
+	  when certain peripherals, such as the video engine, are idle.

drivers/soc/sunxi/Kconfig

@@ -19,12 +19,3 @@ config SUNXI_SRAM
 	  Say y here to enable the SRAM controller support. This
 	  device is responsible on mapping the SRAM in the sunXi SoCs
 	  whether to the CPU/DMA, or to the devices.
-
-config SUN20I_PPU
-	bool "Allwinner D1 PPU power domain driver"
-	depends on ARCH_SUNXI || COMPILE_TEST
-	depends on PM
-	select PM_GENERIC_DOMAINS
-	help
-	  Say y to enable the PPU power domain driver. This saves power
-	  when certain peripherals, such as the video engine, are idle.