usb: dwc3: dwc3-msm: optimize perf vote work

static variable for irq_counter/perf_mode fail for multiple controller,
change to allocate them for each controller instance.

irq_cnt will record irq number for each perf work schedule duration,
it will clear when work execution/cancel.

Change-Id: I1e07277fcd609b37728a9a716cdf5f75ccc35d9b
Signed-off-by: Linyu Yuan <linyyuan@codeaurora.org>