soc: qcom: Fix blackghost status irq missing during BG SSR

BG gpio status irq is missing some times, while doing BG SSR
fix it by delaying enable_irq() around 5ms, as there could
be race for clearing gpio interrupt status bit by enable_irq
before calling gpio summary irq handler.

Change-Id: Id64407d9aa5da45b0298e3de08dae55fe2610eb7
Signed-off-by: Nagireddy Annem <nannem@codeaurora.org>