soc: bcm: brcmstb: Remove bare-metal ARM suspend/resume code

Since 2018 these platforms have supported entry via the ARM Trusted
Firmware using the standard PSCI SYSTEM_SUSPEND function calls. Remove
this legacy code.

Link: https://lore.kernel.org/r/20230224215249.239405-1-f.fainelli@gmail.com
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

Author: ffainelli

drivers/soc/bcm/brcmstb/Kconfig

@@ -4,8 +4,6 @@ if SOC_BRCMSTB
 config BRCMSTB_PM
 	bool "Support suspend/resume for STB platforms"
 	default y
-	depends on PM
-	depends on ARCH_BRCMSTB || BMIPS_GENERIC
-	select ARM_CPU_SUSPEND if ARM
+	depends on PM && BMIPS_GENERIC
 
 endif # SOC_BRCMSTB

drivers/soc/bcm/brcmstb/pm/Makefile

@@ -1,3 +1,2 @@
 # SPDX-License-Identifier: GPL-2.0-only
-obj-$(CONFIG_ARM)		+= s2-arm.o pm-arm.o
 obj-$(CONFIG_BMIPS_GENERIC)	+= s2-mips.o s3-mips.o pm-mips.o