Fix or silence clippy warnings on nightly

Fix:
- dead_code
- clippy::if_then_panic
- clippy::manual_memcpy
- clippy::needless_borrow

Silence:
- clippy::missing_safety_doc
- clippy::needless_range_loop
- clippy::single_match

Signed-off-by: Tim Crawford <tcrawford@system76.com>

tool/src/spi.rs

@@ -196,7 +196,7 @@ impl<'a, S: Spi, T: Timeout> SpiRom<'a, S, T> {
                     (page_address >> 8) as u8,
                     page_address as u8,
                 ])?;
-                self.spi.write(&page)?;
+                self.spi.write(page)?;
 
                 // Poll status for busy unset
                 self.status_wait(1, 0)?;