kernel: b53: the b53 spi driver depends on spi

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35340 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/generic/files/drivers/net/phy/b53/Kconfig

@@ -8,7 +8,7 @@ menuconfig B53
 
 config B53_SPI_DRIVER
 	tristate "B53 SPI connected switch driver"
-	depends on B53
+	depends on B53 && SPI
 	help
 	  Select to enable support for registering switches configured through SPI.