style: cargo fmt kernel crates

crates/adapter-riscv/src/hw/uart.rs

@@ -6,7 +6,9 @@ pub struct Uart {
 
 impl Uart {
     pub fn new() -> Self {
-        Self { base: board::UART_BASE }
+        Self {
+            base: board::UART_BASE,
+        }
     }
 
     pub fn put_char(&self, byte: u8) {
@@ -30,7 +32,11 @@ impl Uart {
         let mut i = 0;
         while value > 0 {
             let digit = (value & 0xF) as u8;
-            buf[i] = if digit < 10 { b'0' + digit } else { b'a' + digit - 10 };
+            buf[i] = if digit < 10 {
+                b'0' + digit
+            } else {
+                b'a' + digit - 10
+            };
             value >>= 4;
             i += 1;
         }