pmdomain: ti: Move and add Kconfig options to the pmdomain subsystem

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

While at it, let's also add a Kconfig option the omap_prm driver, rather
than using ARCH_OMAP2PLUS directly.

Cc: Nishanth Menon <nm@ti.com>
Cc: Santosh Shilimkar <ssantosh@kernel.org>
Cc: Tero Kristo <kristo@kernel.org>
Cc: Tony Lindgren <tony@atomide.com>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/pmdomain/Kconfig

@@ -15,5 +15,6 @@ source "drivers/pmdomain/st/Kconfig"
 source "drivers/pmdomain/starfive/Kconfig"
 source "drivers/pmdomain/sunxi/Kconfig"
 source "drivers/pmdomain/tegra/Kconfig"
+source "drivers/pmdomain/ti/Kconfig"
 
 endmenu

drivers/pmdomain/ti/Kconfig

+# SPDX-License-Identifier: GPL-2.0-only
+
+config OMAP2PLUS_PRM
+	bool
+	depends on ARCH_OMAP2PLUS
+	default ARCH_OMAP2PLUS
+
+if SOC_TI
+
+config TI_SCI_PM_DOMAINS
+	tristate "TI SCI PM Domains Driver"
+	depends on TI_SCI_PROTOCOL
+	depends on PM_GENERIC_DOMAINS
+	help
+	  Generic power domain implementation for TI device implementing
+	  the TI SCI protocol.
+
+	  To compile this as a module, choose M here. The module will be
+	  called ti_sci_pm_domains. Note this is needed early in boot before
+	  rootfs may be available.
+
+endif

drivers/pmdomain/ti/Makefile

 # SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_ARCH_OMAP2PLUS)		+= omap_prm.o
+obj-$(CONFIG_OMAP2PLUS_PRM)		+= omap_prm.o
 obj-$(CONFIG_TI_SCI_PM_DOMAINS)		+= ti_sci_pm_domains.o

drivers/soc/ti/Kconfig

@@ -50,18 +50,6 @@ config WKUP_M3_IPC
 	  to communicate and use the Wakeup M3 for PM features like suspend
 	  resume and boots it using wkup_m3_rproc driver.
 
-config TI_SCI_PM_DOMAINS
-	tristate "TI SCI PM Domains Driver"
-	depends on TI_SCI_PROTOCOL
-	depends on PM_GENERIC_DOMAINS
-	help
-	  Generic power domain implementation for TI device implementing
-	  the TI SCI protocol.
-
-	  To compile this as a module, choose M here. The module will be
-	  called ti_sci_pm_domains. Note this is needed early in boot before
-	  rootfs may be available.
-
 config TI_K3_RINGACC
 	tristate "K3 Ring accelerator Sub System"
 	depends on ARCH_K3 || COMPILE_TEST