rust: miscdevice: fix typo in MiscDevice::ioctl documentation

Fixes one small typo (`utilties` to `utilities`) in the documentation of
`MiscDevice::ioctl`.

Fixes: f893691e7426 ("rust: miscdevice: add base miscdevice abstraction")
Signed-off-by: Christian Schrefl <[e-mail]>
Reviewed-by: Benno Lossin <[e-mail]>
Reviewed-by: Alice Ryhl <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

rust/kernel/miscdevice.rs

···
 
     /// Handler for ioctls.
     ///
-    /// The `cmd` argument is usually manipulated using the utilties in [`kernel::ioctl`].
+    /// The `cmd` argument is usually manipulated using the utilities in [`kernel::ioctl`].
     ///
     /// [`kernel::ioctl`]: mod@crate::ioctl
     fn ioctl(