Enable watermarks settings (previously commented out) for MPU RX/TX.
Otherwise irqs aren't issued properly.
Tested-by: Pavel Hofman <pavel.hofman@insite.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
                        outb(inb(ICEREG1724(ice, IRQMASK)) &
                             ~(VT1724_IRQ_MPU_RX | VT1724_IRQ_MPU_TX),
                             ICEREG1724(ice, IRQMASK));
-#if 0 /* for testing */
                        /* set watermarks */
                        outb(VT1724_MPU_RX_FIFO | 0x1,
                             ICEREG1724(ice, MPU_FIFO_WM));
                        outb(0x1, ICEREG1724(ice, MPU_FIFO_WM));
-#endif
                }
        }