added driver for cp210x serial to usb, don't overwrite /etc/hosts and /etc/hostname on Update

GfA-buildroot-changes.patch

@@ -326,7 +326,7 @@ index 0000000..4706719
 +cp $TMP_PATH/*.dtb /mnt
 +
 +#rootfs auspacken
-+tar -C / --exclude=./opt --exclude=./etc/inittab --exclude=./etc/network/interfaces -xzvf $TMP_PATH/rootfs.tar.gz
++tar -C / --exclude=./opt --exclude=./etc/inittab --exclude=./etc/network/interfaces --exclude=./etc/hosts --exclude=./etc/hostname -xzvf $TMP_PATH/rootfs.tar.gz
 +
 +echo "sync mmc be patient ...."
 +sync

board/GfA/Display001/BUILD

@@ -1 +1 @@
-316
+318

board/GfA/Display001/Display001_defconfig

@@ -2448,7 +2448,7 @@ CONFIG_USB_SERIAL_SIMPLE=y
 # CONFIG_USB_SERIAL_CH341 is not set
 # CONFIG_USB_SERIAL_WHITEHEAT is not set
 # CONFIG_USB_SERIAL_DIGI_ACCELEPORT is not set
-# CONFIG_USB_SERIAL_CP210X is not set
+CONFIG_USB_SERIAL_CP210X=m
 # CONFIG_USB_SERIAL_CYPRESS_M8 is not set
 # CONFIG_USB_SERIAL_EMPEG is not set
 CONFIG_USB_SERIAL_FTDI_SIO=y