usb: dwc3-msm: Enable pmic_id_irq after driver_data is populated

There was an issue where the pmic_id_irq was triggered very early
during device boot-up, even before the driver_data was populated.
Since the pmic_id_irq is not enabled at this point, it causes a NULL
pointer exception.
So to fix this, enable pmic_id_irq after driver_data is being populated.

CRs-fixed: 741573
Change-Id: I0da140f0d344f5035f12b7aaf210ae7e116aa29d
Signed-off-by: Azhar Shaikh <azhars@codeaurora.org>