beaglebone: move BBB-specific bits into a BBB config

Change-Id: If8551e362a15af83964a84a450f76293dc2b0cf0
diff --git a/board/czechlight/beaglebone/kconfig b/board/czechlight/beaglebone/kconfig
index 2871883..5dcd313 100644
--- a/board/czechlight/beaglebone/kconfig
+++ b/board/czechlight/beaglebone/kconfig
@@ -1 +1,5 @@
 CONFIG_OMAP_WATCHDOG=y
+
+# CONFIG_USB_ZERO is not set
+CONFIG_USB_CDC_COMPOSITE=m
+# CONFIG_USB_G_NOKIA is not set
diff --git a/board/czechlight/common/overlay/usr/lib/systemd/network/30-usbnet-apipa.network b/board/czechlight/beaglebone/overlay/etc/systemd/system/network/30-usbnet-apipa.network
similarity index 100%
rename from board/czechlight/common/overlay/usr/lib/systemd/network/30-usbnet-apipa.network
rename to board/czechlight/beaglebone/overlay/etc/systemd/system/network/30-usbnet-apipa.network
diff --git a/board/czechlight/common/kconfig b/board/czechlight/common/kconfig
index 2b794ed..d2196e7 100644
--- a/board/czechlight/common/kconfig
+++ b/board/czechlight/common/kconfig
@@ -1,7 +1,3 @@
-# CONFIG_USB_ZERO is not set
-CONFIG_USB_CDC_COMPOSITE=m
-# CONFIG_USB_G_NOKIA is not set
-
 # CzechLight stuff:
 # userspace access to the I2C bus
 CONFIG_I2C_CHARDEV=y