improve readme

README.md

@@ -1,4 +1,4 @@
-# Kernel for Raspberry Pi 32 bits, for usage in gokrazy
+# Linux kernel for Raspberry Pi 32 bits, for usage in gokrazy
 
 Usage
 
@@ -6,7 +6,6 @@ Usage
 GOARCH=arm ./gokr-packer \
 		-kernel_package=github.com/oliverpool/kernel-rpi-os-32/dist \
 		-firmware_package=github.com/oliverpool/firmware-rpi/dist \
-		-serial_console=disabled \
 		github.com/gokrazy/hello
 ```
 
@@ -17,3 +16,8 @@ go run cmd/compile/main.go
 ```
 
 It will compile the kernel located in `linux-sources` and copy the resulting files in the `dist` folder.
+
+## Licenses
+
+- The `vmlinuz` and `*.dtb` files are built from [Linux kernel sources](https://github.com/raspberrypi/linux), released under the GPL (see `linux-sources/COPYING`)
+- The rest of the repository is released under BSD 3-Clause License (see `LICENSE`)