kbc: Add reset function

This function can be called after EC init to put the KBC into a known
working state.

Signed-off-by: Tim Crawford <tcrawford@system76.com>

src/ec/ite/include/ec/kbc.h

@@ -8,8 +8,6 @@
 #include <stdbool.h>
 #include <stdint.h>
 
-void kbc_init(void);
-
 struct Kbc {
     // Control register
     volatile uint8_t *control;