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

To do: engine/{menus, overworld}

home/gfx.asm

@@ -118,7 +118,7 @@ LoadFontsExtra2:
 DecompressRequest2bpp::
 	push de
 	ld a, BANK(sScratch)
-	call GetSRAMBank
+	call OpenSRAM
 	push bc
 
 	ld de, sScratch

home/init.asm

@@ -205,7 +205,7 @@ ClearsScratch::
 ; Wipe the first 32 bytes of sScratch
 
 	ld a, BANK(sScratch)
-	call GetSRAMBank
+	call OpenSRAM
 	ld hl, sScratch
 	ld bc, $20
 	xor a

home/sram.asm

@@ -1,11 +1,10 @@
-GetSRAMBank::
-; load sram bank a
+OpenSRAM::
 ; if invalid bank, sram is disabled
 	cp NUM_SRAM_BANKS
-	jr c, OpenSRAM
+	jr c, .valid
 	jr CloseSRAM
 
-OpenSRAM::
+.valid:
 ; switch to sram bank a
 	push af
 ; latch clock data

home/time.asm

@@ -261,7 +261,7 @@ UnreferencedClearRTCStatus::
 	xor a
 	push af
 	ld a, BANK(sRTCStatusFlags)
-	call GetSRAMBank
+	call OpenSRAM
 	pop af
 	ld [sRTCStatusFlags], a
 	call CloseSRAM
@@ -272,7 +272,7 @@ RecordRTCStatus::
 	ld hl, sRTCStatusFlags
 	push af
 	ld a, BANK(sRTCStatusFlags)
-	call GetSRAMBank
+	call OpenSRAM
 	pop af
 	or [hl]
 	ld [hl], a
@@ -282,7 +282,7 @@ RecordRTCStatus::
 CheckRTCStatus::
 ; check sRTCStatusFlags
 	ld a, BANK(sRTCStatusFlags)
-	call GetSRAMBank
+	call OpenSRAM
 	ld a, [sRTCStatusFlags]
 	call CloseSRAM
 	ret