usb: ehci: Updating URBs for bam to bam mode

Clearing error counter (Cerr) bits for BAM to BAM URB,
so the host controller will ignore errors for that URB's Qtd.

Without this change the HCD will retry to retransmit the data
up to 3 times, and then cause a data stall.

Change-Id: Ie47337d8c66dbcfb265b1786570fc1b85ca7cc47
Signed-off-by: Shimrit Malichi <smalichi@codeaurora.org>