Harmonize engine/{movie, pokemon} with pokegold (renames GetSRAMBank to OpenSRAM)

To do: engine/{menus, overworld}

engine/battle/check_battle_scene.asm

@@ -20,7 +20,7 @@ CheckBattleScene:
 	jr nz, .from_wram
 
 	ld a, BANK(s4_a60c) ; MBC30 bank used by JP Crystal; inaccessible by MBC3
-	call GetSRAMBank
+	call OpenSRAM
 	ld a, [s4_a60c]
 	ld c, a
 	call CloseSRAM

engine/battle/core.asm

@@ -231,7 +231,7 @@ BattleTurn:
 Stubbed_Function3c1bf:
 	ret
 	ld a, BANK(s5_a89b) ; MBC30 bank used by JP Crystal; inaccessible by MBC3
-	call GetSRAMBank
+	call OpenSRAM
 	ld hl, s5_a89b ; address of MBC30 bank
 	inc [hl]
 	jr nz, .finish
@@ -8398,7 +8398,7 @@ DisplayLinkBattleResult:
 	call DelayFrames
 
 	ld a, BANK(sLinkBattleStats)
-	call GetSRAMBank
+	call OpenSRAM
 
 	call AddLastLinkBattleToLinkRecord
 	call ReadAndPrintLinkBattleRecord
@@ -8446,7 +8446,7 @@ NUM_LINK_BATTLE_RECORDS EQUS "((sLinkBattleStatsEnd - sLinkBattleRecord) / LINK_
 
 _DisplayLinkRecord:
 	ld a, BANK(sLinkBattleStats)
-	call GetSRAMBank
+	call OpenSRAM
 
 	call ReadAndPrintLinkBattleRecord
 

engine/battle/read_trainer_party.asm

@@ -74,7 +74,7 @@ ReadTrainerParty:
 
 .cal2
 	ld a, BANK(sMysteryGiftTrainer)
-	call GetSRAMBank
+	call OpenSRAM
 	ld de, sMysteryGiftTrainer
 	call TrainerType2
 	call CloseSRAM
@@ -338,14 +338,14 @@ GetTrainerName::
 	jr nz, .not_cal2
 
 	ld a, BANK(sMysteryGiftTrainerHouseFlag)
-	call GetSRAMBank
+	call OpenSRAM
 	ld a, [sMysteryGiftTrainerHouseFlag]
 	and a
 	call CloseSRAM
 	jr z, .not_cal2
 
 	ld a, BANK(sMysteryGiftPartnerName)
-	call GetSRAMBank
+	call OpenSRAM
 	ld hl, sMysteryGiftPartnerName
 	call CopyTrainerName
 	jp CloseSRAM