tool: Fix clippy warnings

Fix:

- clippy::unnecessary_cast
- clippy::needless_borrow

Allow:

- clippy::uninlined_format_args
- clippy::get_first

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

tool/src/access/lpc/linux.rs

@@ -158,7 +158,7 @@ impl Access for AccessLpcLinux {
         }
 
         // Write command byte, which starts command
-        self.write_cmd(SMFI_CMD_CMD, cmd as u8)?;
+        self.write_cmd(SMFI_CMD_CMD, cmd)?;
 
         // Wait for command to finish with timeout
         self.timeout.reset();