qcacmn: Increase the number of pcie slots supported
With some new platforms planned, 5 pcie slots have to be
supported by the wlan driver.
Increase WLAN_CFG_MAX_PCIE_GROUPS to 5 to make sure wlan
probe is successful even when the wlan card is attached
to the last pcie slot.
Change-Id: Iab040a26e58b9d95321c29f88f87b7923198b7dd
CRs-Fixed: 3390735