Guides: Added dkms.conf content for apple-bce-drv to dkms guide

Keep in until t2linux/apple-bce-drv#2 gets closed

docs/guides/dkms.md

@@ -13,6 +13,19 @@ If you have a Touchbar, is it working? If no, then you'll need the apple-ibridge
 2. Installing the BCE (Buffer Copy Engine) module for Keyboard and Audio
 	- If you are on arch, you can use Aunali1's [apple-bce-dkms-git package](https://github.com/aunali1/apple-bce-arch/releases)
 	- Otherwise, `sudo git clone https://github.com/t2linux/apple-bce-drv /usr/src/apple-bce-r183.c884d9c`
+
+    Create a `dkms.conf` file in `/usr/src/apple-bce-r183.c884d9c` and put in the following:
+
+    ```
+    PACKAGE_NAME="apple-bce"
+    PACKAGE_VERSION="r183.c884d9c"
+    MAKE[0]="make KVERSION=$kernelver"
+    CLEAN="make clean"
+    BUILT_MODULE_NAME[0]="apple-bce"
+    DEST_MODULE_LOCATION[0]="/kernel/drivers/misc"
+    AUTOINSTALL="yes"
+    ```
+
 	- Use `sudo dkms install -m apple-bce -v r183.c884d9c`. Add `-k x.x.x-mbp` if you need to install for a specific kernel version.
 3. Installing the Touchbar and Ambient Light sensor modules
 	- `sudo git clone https://github.com/t2linux/apple-ib-drv /usr/src/apple-ibridge-0.1`