[feat] 低质量ttf render

kernel/serial.cpp

@@ -32,7 +32,7 @@ void serial_write(String str) {
     }
 }
 
-void serial_write_hex(UINTN val, bool fill) {
+void serial_write_hex(UINTN val) {
     char buf[19];
     buf[0] = '0';
     buf[1] = 'x';
@@ -47,11 +47,6 @@ void serial_write_hex(UINTN val, bool fill) {
             tmp[len++] = digit < 10 ? '0' + digit : 'A' + digit - 10;
             val >>= 4;
         }
-        if (fill) {
-            while (len < 16) {
-                buf[pos++] = '0';
-            }
-        }
         for (SSINT32 i = len - 1; i >= 0; i--) {
             buf[pos++] = tmp[i];
         }