wcnss: Reset IRIS card before Starting IRIS XO configuration

Set iris_reset bit of PMU CFG register to reset the IRIS
card before Starting IRIS XO configuration.

Change-Id: I49dd6812995c8c284c4497b4c356b82e95f28626
CRs-Fixed: 664642
Signed-off-by: Hardik Kantilal Patel <hkpatel@codeaurora.org>