qcacld-3.0: Add PCIe register window lock related APIs

The register window needs to be configed properly before accessing
any larger than 4K range PCIe registers. Expose the lock in PLD to
avoid race condition when both platform and host drivers
try to config it.

Change-Id: Icd3df3d4d2cc2ecc3df608e7b767a3e654b94500
CRs-Fixed: 2549887
3 files changed