Description: mwifiex: pcie: Fix memory leak in mwifiex_pcie_init_evt_ring 
References:
 https://github.com/torvalds/linux/commit/d10dcb615c8e29d403a24d35f8310a7a53e3050c
Notes:
 bwh> Introduced in 3.9 by commit fc3314609047 "mwifiex: use pci_alloc/
 bwh> free_consistent APIs for PCIe".
Bugs:
upstream: released (5.5-rc1) [d10dcb615c8e29d403a24d35f8310a7a53e3050c]
4.19-upstream-stable: released (4.19.92) [1b3e52db38471d5ac896eb9be111565e3734d5b5]
4.9-upstream-stable: released (4.9.208) [716156b896197824e55fc2f8244c8c43e0ed73e1]
3.16-upstream-stable: released (3.16.79) [914927c7bac4ecd2351bdee0cd5b2b1c11150342]
sid: released (5.4.8-1)
4.19-buster-security: released (4.19.98-1)
4.9-stretch-security: released (4.9.210-1)
3.16-jessie-security: released (3.16.81-1)