power: reset: Default POWER_RESET_BRCMSTB to BMIPS_GENERIC

On Broadcom MIPS STB platforms, BMIPS_GENERIC is the Kconfig symbol that
is used, make this reboot driver default to that value to make sure we
can reboot a system properly.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

drivers/power/reset/Kconfig

@@ -60,7 +60,7 @@ config POWER_RESET_BRCMSTB
 	bool "Broadcom STB reset driver"
 	depends on ARM || ARM64 || MIPS || COMPILE_TEST
 	depends on MFD_SYSCON
-	default ARCH_BRCMSTB
+	default ARCH_BRCMSTB || BMIPS_GENERIC
 	help
 	  This driver provides restart support for Broadcom STB boards.