Revert "USB: disable rust bindings from the build for now"

This reverts commit c584a1c7c8.

It brings the rust bindings for USB back into the build so that we can
work off of this for future kernel releases.

Link: https://lore.kernel.org/r/2025100827-divorcee-steadier-b40b@gregkh
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

rust/bindings/bindings_helper.h

@@ -80,6 +80,7 @@
 #include <linux/slab.h>
 #include <linux/task_work.h>
 #include <linux/tracepoint.h>
+#include <linux/usb.h>
 #include <linux/wait.h>
 #include <linux/workqueue.h>
 #include <linux/xarray.h>

rust/helpers/helpers.c

@@ -56,6 +56,7 @@
 #include "task.c"
 #include "time.c"
 #include "uaccess.c"
+#include "usb.c"
 #include "vmalloc.c"
 #include "wait.c"
 #include "workqueue.c"

rust/kernel/lib.rs

@@ -138,6 +138,8 @@
 pub mod tracepoint;
 pub mod transmute;
 pub mod types;
+#[cfg(CONFIG_USB = "y")]
+pub mod usb;
 pub mod uaccess;
 pub mod workqueue;
 pub mod xarray;

samples/rust/Kconfig

@@ -107,7 +107,7 @@ config SAMPLE_RUST_DRIVER_PLATFORM
 
 config SAMPLE_RUST_DRIVER_USB
 	tristate "USB Driver"
-	depends on USB = y && BROKEN
+	depends on USB = y
 	help
 	  This option builds the Rust USB driver sample.