usb: host: xhci: Fix secondary event ring setup

In xhci_event_ring_setup() function xhci_alloc_erst() API is
incorrectly passing primary interrupter's event ring and erst
address instead of using it from the function parameter. Due to
that erst dma address does not get populated. This results into
smmu page fault when secondary event ring is setup and erst base
address is programmed as 0x0.

Change-Id: I71227ecd2b8da9efa8b14157777660f139180438
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>