d_a_andsw2 OK, d_a_player / d_a_alink cleanup, d_a_alink_hook mostly done (#1957)

* d_a_andsw2 OK

* d_a_player cleanup, d_a_alink cleanup and work on d_a_alink_hook

* remove asm

* d_kankyo_wether almost done

* some work on d_kankyo_rain

src/d/d_lib.cpp

@@ -319,7 +319,7 @@ bool STControl::checkDownTrigger() {
 #pragma push
 #pragma optimization_level 0
 #pragma optimizewithasm off
-asm void dLib_getEventSwitchNo(int param_0) {
+asm u8 dLib_getEventSwitchNo(int param_0) {
     nofralloc
 #include "asm/d/d_lib/dLib_getEventSwitchNo__Fi.s"
 }