cnss_pci: fix the race condition bug in WLAN firmware table config

Update the synchronization process of the cnss platform driver
memory expansion and WLAN firmware table configuration from
the userspace through sysfs firmware update node.

CRs-Fixed: 2071560
Change-Id: I672ba84ad10c905be7855c1b8a930ac7adf349f1
Signed-off-by: Sarada Prasanna Garnayak <sgarna@codeaurora.org>