ide: qd65xx: Fix cast to pointer from integer of different size

Integer passed as pointer to drvdata should be cast to unsigned long to
avoid warning (compile testing on alpha architecture):

    drivers/ide/qd65xx.c: In function ‘qd6580_init_dev’:
    drivers/ide/qd65xx.c:312:27: warning:
        cast to pointer from integer of different size [-Wint-to-pointer-cast]
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/ide/qd65xx.c

@@ -299,7 +299,7 @@ static void __init qd6500_init_dev(ide_drive_t *drive)
 static void __init qd6580_init_dev(ide_drive_t *drive)
 {
 	ide_hwif_t *hwif = drive->hwif;
-	u16 t1, t2;
+	unsigned long t1, t2;
 	u8 base = (hwif->config_data & 0xff00) >> 8;
 	u8 config = QD_CONFIG(hwif);