The i.MX6Quad processor has the integrated USB Host core with one downstream port with PHY. You can easily expand the number of downstream ports by adding an external USB Hub IC, such as the following ones from Microchip:
http://www.microchip.com/design-centers/usb/usb-hubs-and-devices/products/usb-hubs
or Texas Instruments:
http://www.ti.com/lsds/ti/interface/usb-hub-controller-products.page
or Cypress:
http://www.cypress.com/products/hx2vl
Please note that NXP cannot recommend one vendor/product over another in any way.
Have a great day,
Artur
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