[FS#547] SATA Port Multiplier support for mvebu devices

[LEDE Bugs]

The following task has a new comment added:

FS#547 - SATA Port Multiplier support for mvebu devices
User who did this - Olgierd Wołodkiewicz (olgierdw)

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Please reopen and do for Marvel chipset. E.g. LinkSys WRT3200acm has the chipset and eSata to use PMP on eSata.

Explanation:
Generally routers like Linksys WRT3200Acm have both USB3 and eSata interfaces. To not cause Wifi 2.4GHz interference users should switch their NAS from USB3 to eSata. And this is not possible now if they have >1 HDD connected. With 2 or more HDD over eSata required is PMP to access both drives. USB is different story, but Wifi 2.4GHz is unusable then.
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=547#comment4006