drm/asahi: microseq: Clippy fixes

Signed-off-by: Asahi Lina <[email protected]>

Author: hoshinolina

drivers/gpu/drm/asahi/microseq.rs

@@ -46,6 +46,8 @@ impl Builder {
         let off = self.ops.len();
         let p: *const T = &op;
         let p: *const u8 = p as *const u8;
+        // SAFETY: Microseq operations always have no padding bytes, so it is safe to
+        // access them as a byte slice.
         let s: &[u8] = unsafe { core::slice::from_raw_parts(p, core::mem::size_of::<T>()) };
         self.ops.extend_from_slice(s, GFP_KERNEL)?;
         Ok(off as i32)