pmdomain: starfive: Replace SOC_STARFIVE with ARCH_STARFIVE

Using ARCH_FOO symbol is preferred than SOC_FOO.
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Walker Chen <walker.chen@starfivetech.com>
Signed-off-by: Changhuang Liang <changhuang.liang@starfivetech.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230913-legibly-treachery-567cffcb5604@spudSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/soc/starfive/Kconfig

@@ -3,8 +3,8 @@
 config JH71XX_PMU
 	bool "Support PMU for StarFive JH71XX Soc"
 	depends on PM
-	depends on SOC_STARFIVE || COMPILE_TEST
-	default SOC_STARFIVE
+	depends on ARCH_STARFIVE || COMPILE_TEST
+	default ARCH_STARFIVE
 	select PM_GENERIC_DOMAINS
 	help
 	  Say 'y' here to enable support power domain support.