soc: brcmstb: enable drivers for ARM64 and BMIPS

We enable the BRCMSTB SoC drivers not only for ARM, but also ARM64 and
BMIPS.

Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

drivers/soc/bcm/Kconfig

@@ -11,7 +11,7 @@ config RASPBERRYPI_POWER
 
 config SOC_BRCMSTB
 	bool "Broadcom STB SoC drivers"
-	depends on ARM
+	depends on ARM || ARM64 || BMIPS_GENERIC || COMPILE_TEST
 	select SOC_BUS
 	help
 	  Enables drivers for the Broadcom Set-Top Box (STB) series of chips.