pmdomain: ti: Select PM_GENERIC_DOMAINS

Select PM_GENERIC_DOMAINS instead of depending on it to ensure
it is always enabled when TI_SCI_PM_DOMAINS is selected.
Since PM_GENERIC_DOMAINS is an implicit symbol, it can only be enabled
through 'select' and cannot be explicitly enabled in configuration.
This simplifies the dependency chain and prevents build issues

Signed-off-by: Guillaume La Roque <[e-mail]>
Reviewed-by: Nishanth Menon <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/pmdomain/ti/Kconfig

···
 config TI_SCI_PM_DOMAINS
 	tristate "TI SCI PM Domains Driver"
 	depends on TI_SCI_PROTOCOL
-	depends on PM_GENERIC_DOMAINS
+	select PM_GENERIC_DOMAINS if PM
 	help
 	  Generic power domain implementation for TI device implementing
 	  the TI SCI protocol.