sata_sil24: implement PORT_RST
As DEV_RST (hardreset) sometimes fail to recover the controller (especially after PMP DMA CS errata). In such cases, perform PORT_RST prior to DEV_RST. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
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3454dc69
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