driver: wdt: npcx: correct the drawing of npcx watchdog module.

The source clock of the watchdog module is selected to the input of T0
timer, not output. Correct the drawing in case confusing the users.

Signed-off-by: Mulin Chao <[email protected]>

Author: MulinChao

drivers/watchdog/wdt_npcx.c

@@ -16,10 +16,10 @@
  * failure detection. Please refer the block diagram for more detail.
  *
  *            +---------------------+    +-----------------+
- *  LFCLK --->| T0 Prescale Counter |--->| 16-Bit T0 Timer |---+----> T0 Timer
- * (32kHz)    |     (TWCP 1:32)     |    |     (TWDT0)     |   |       Event
- *            +---------------------+    +-----------------+   |
- *  +----------------------------------------------------------+
+ *  LFCLK --->| T0 Prescale Counter |-+->| 16-Bit T0 Timer |--------> T0 Timer
+ * (32kHz)    |     (TWCP 1:32)     | |  |     (TWDT0)     |           Event
+ *            +---------------------+ |  +-----------------+
+ *  +---------------------------------+
  *  |
  *  |    +-------------------+    +-----------------+
  *  +--->| Watchdog Prescale |--->| 8-Bit Watchdog  |-----> Watchdog Event/Reset