usb: host: Remove remaining pci_pool in comments

This replaces remaining occurences of pci_pool by dma_pool, as
this is the new API that could be used for that purpose.
Signed-off-by: NRomain Perier <romain.perier@collabora.com>
Reviewed-by: NPeter Senna Tschudin <peter.senna@collabora.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/ehci-hcd.c

@@ -597,7 +597,7 @@ static int ehci_run (struct usb_hcd *hcd)
 	/*
 	 * hcc_params controls whether ehci->regs->segment must (!!!)
 	 * be used; it constrains QH/ITD/SITD and QTD locations.
-	 * pci_pool consistent memory always uses segment zero.
+	 * dma_pool consistent memory always uses segment zero.
 	 * streaming mappings for I/O buffers, like pci_map_single(),
 	 * can return segments above 4GB, if the device allows.
 	 *

drivers/usb/host/fotg210-hcd.c

@@ -5047,7 +5047,7 @@ static int fotg210_run(struct usb_hcd *hcd)
 	/*
 	 * hcc_params controls whether fotg210->regs->segment must (!!!)
 	 * be used; it constrains QH/ITD/SITD and QTD locations.
-	 * pci_pool consistent memory always uses segment zero.
+	 * dma_pool consistent memory always uses segment zero.
 	 * streaming mappings for I/O buffers, like pci_map_single(),
 	 * can return segments above 4GB, if the device allows.
 	 *

drivers/usb/host/oxu210hp-hcd.c

@@ -2708,7 +2708,7 @@ static int oxu_run(struct usb_hcd *hcd)
 
 	/* hcc_params controls whether oxu->regs->segment must (!!!)
 	 * be used; it constrains QH/ITD/SITD and QTD locations.
-	 * pci_pool consistent memory always uses segment zero.
+	 * dma_pool consistent memory always uses segment zero.
 	 * streaming mappings for I/O buffers, like pci_map_single(),
 	 * can return segments above 4GB, if the device allows.
 	 *