spi: bcm63xx-hsspi: allow building for BMIPS

bcm63xx-hsspi controller is present on several BMIPS SoCs (BCM6318, BCM6328,
BCM6362 and BCM63268).
Signed-off-by: NÁlvaro Fernández Rojas <noltari@gmail.com>
Acked-by: NFlorian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20200615090943.2936839-5-noltari@gmail.comSigned-off-by: NMark Brown <broonie@kernel.org>

drivers/spi/Kconfig

@@ -155,7 +155,7 @@ config SPI_BCM63XX
 
 config SPI_BCM63XX_HSSPI
 	tristate "Broadcom BCM63XX HS SPI controller driver"
-	depends on BCM63XX || ARCH_BCM_63XX || COMPILE_TEST
+	depends on BCM63XX || BMIPS_GENERIC || ARCH_BCM_63XX || COMPILE_TEST
 	help
 	  This enables support for the High Speed SPI controller present on
 	  newer Broadcom BCM63XX SoCs.