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: I466748df07aba6d7bdc79c7b2b17b3a57c58d3d4
Signed-off-by: Uttkarsh Aggarwal <quic_uaggarwa@quicinc.com>