x86: i8042: Clean up the driver per coding convention

- Rename CamelCase variables to conform U-Boot coding convention
- Rename wait_until_kbd_output_full() to kbd_output_full()
- Change to use macros for i8042 command and control register bits

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
2 files changed