DWC3 host and XHCI plat now communicates the maximum number
of interrupters the XHCI HCD will allocate. Since platforms
only require a limited number of interrupters (i.e. 3) make
sure XHCI doesn't allocate more than is required.
Change-Id: I9e8592c8f62562f44c760571ac1505ab80b05fc6
Signed-off-by: Jigyanshu Mani <quic_jmani@quicinc.com>