Clean warnings for Rcc module of crate

Author: no111u3

src/rcc.rs

@@ -154,12 +154,12 @@ impl CFGR {
                 0 => unreachable!(),
                 1 => 0b0111,
                 2 => 0b1000,
-                3...5 => 0b1001,
-                6...11 => 0b1010,
-                12...39 => 0b1011,
-                40...95 => 0b1100,
-                96...191 => 0b1101,
-                192...383 => 0b1110,
+                3..=5 => 0b1001,
+                6..=11 => 0b1010,
+                12..=39 => 0b1011,
+                40..=95 => 0b1100,
+                96..=191 => 0b1101,
+                192..=383 => 0b1110,
                 _ => 0b1111,
             };