fix boot on mx53

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
imx: mx53 sata now works

[    0.107401] libata version 3.00 loaded.
[    1.030519] ata1: SATA max UDMA/133 mmio [mem 0x10000000-0x10003fff] port 0x100 irq 44
[    1.606950] ata1: softreset failed (device not ready)
[    1.612060] ata1: applying PMP SRST workaround and retrying
[    1.816953] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[    1.837075] ata1.00: ATA-7: WDC WD1600YS-01SHB1, 20.06C06, max UDMA/133
[    1.843737] ata1.00: 321672960 sectors, multi 0: LBA48 NCQ (depth 31/32)
[    1.850862] ata1.00: failed to get Identify Device Data, Emask 0x1
[    1.852249] ata1.00: failed to get Identify Device Data, Emask 0x1
[    1.852295] ata1.00: configured for UDMA/133

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>