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

To do: engine/{menus, overworld}

mobile/mobile_menu.asm

@@ -180,7 +180,7 @@ Function4a0c2:
 	ld a, 2
 	call MenuClickSound
 	ld a, BANK(sPlayerData)
-	call GetSRAMBank
+	call OpenSRAM
 	ld hl, sPlayerData + wPlayerName - wPlayerData
 	ld de, wPlayerName
 	ld bc, NAME_LENGTH_JAPANESE
@@ -378,7 +378,7 @@ Function4a28a:
 	call WaitBGMap
 	call LoadStandardMenuHeader
 	ld a, $5
-	call GetSRAMBank
+	call OpenSRAM
 	ld a, [$aa4b]
 	call CloseSRAM
 	and a
@@ -429,7 +429,7 @@ Function4a28a:
 	cp $2
 	jr z, .dont_delete_password
 	ld a, BANK(sMobileLoginPassword)
-	call GetSRAMBank
+	call OpenSRAM
 	ld hl, sMobileLoginPassword
 	xor a
 	ld bc, MOBILE_LOGIN_PASSWORD_LENGTH