The watchdog sleep method never worked

There were grand plans to set a long-ish watchdog and
have it put the machine to a deep sleep when it fired.
But this never seemed to work so we remove it.

Signed-off-by: Vernon Mauery <vernon@mauery.com>

Author: vmauery

cw-kbd.c

@@ -363,28 +363,6 @@ void power_down(void) {
 	SREG = imode;
 }
 
-#define wdt_interrupt(value)   \
-__asm__ __volatile__ (  \
-	"in __tmp_reg__,__SREG__" "\n\t"   \
-	"cli" "\n\t"   \
-	"wdr" "\n\t"   \
-	"sts %0,%1" "\n\t"  \
-	"out __SREG__,__tmp_reg__" "\n\t"   \
-	"sts %0,%2" "\n\t" \
-	: /* no outputs */  \
-	: "M" (_SFR_MEM_ADDR(_WD_CONTROL_REG)), \
-	"r" (_BV(_WD_CHANGE_BIT) | _BV(WDIE)), \
-	"r" ((uint8_t) ((value & 0x08 ? _WD_PS3_MASK : 0x00) | \
-		_BV(WDIE) | (value & 0x07)) ) \
-	: "r0"  \
-)
-
-ISR(WDT_vect) {
-	wdt_disable();
-	power_down();
-	wdt_interrupt(WDTO_8S);
-}
-
 static void usb_work(void) {
 	HID_Device_MillisecondElapsed(&kbd_iface);
 	HID_Device_USBTask(&kbd_iface);

timer.c

@@ -264,6 +264,7 @@ static t16_mode_t timer3_mode_value = 0;
 static timer_callback timer3_capture_callback_ = NULL;
 static timer_callback timer3_compare_a_callback_ = NULL;
 static timer_callback timer3_compare_b_callback_ = NULL;
+static timer_callback timer3_compare_c_callback_ = NULL;
 static timer_callback timer3_overflow_callback_ = NULL;
 
 /* Timer 3 Capture event */
@@ -285,6 +286,12 @@ ISR( TIMER3_COMPB_vect )
 	if( timer3_compare_b_callback_) timer3_compare_b_callback_();
 }
 
+/* Timer 3 Compare match B */
+ISR( TIMER3_COMPC_vect )
+{
+	if( timer3_compare_c_callback_) timer3_compare_c_callback_();
+}
+
 /* Timer 3 Overflow */
 ISR( TIMER3_OVF_vect)
 {