ARM: rockchip: remove REGULATOR conditional to PM

PM is explicitly enabled in lines just below so
REGULATOR can be too.

Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org>
Link: https://lore.kernel.org/r/20250915083317.2885761-5-mikko.rapeli@linaro.org
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: mikkorapeli-linaro

arch/arm/mach-rockchip/Kconfig

@@ -13,7 +13,7 @@ config ARCH_ROCKCHIP
 	select HAVE_ARM_SCU if SMP
 	select HAVE_ARM_TWD if SMP
 	select DW_APB_TIMER_OF
-	select REGULATOR if PM
+	select REGULATOR
 	select ROCKCHIP_TIMER
 	select ARM_GLOBAL_TIMER
 	select CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK