Fix keylayouts to use BACK instead of incorrect BUTTON_BACK.

Fix duplicate keys in a couple of the onza controllers.  Also, add them to the
Makefile so they actually get included in the build.

Bug: 8292749
Change-Id: I8246155f84d0c3c75b21e37fb579227fda76e197
diff --git a/data/keyboards/Vendor_054c_Product_0268.kl b/data/keyboards/Vendor_054c_Product_0268.kl
index 62c5f4d5..7c60137 100644
--- a/data/keyboards/Vendor_054c_Product_0268.kl
+++ b/data/keyboards/Vendor_054c_Product_0268.kl
@@ -35,7 +35,7 @@
 key 0x122    BUTTON_THUMBR
 
 # PS key
-key 0x2d0    BUTTON_HOME
+key 0x2d0    HOME
 
 # Left Analog Stick
 axis 0x00    X