pci: msm: Use framework API to enable AER for endpoints

Currently advanced error reporting is enabled by pci msm
controller driver using custom API. Since AER root port
service driver provides exported API
pci_enable_pcie_error_reporting() use this API to enable
support for AER and get rid of custom API. Framework API
needs to be wrapped under QGKI kernel config to prevent
GKI ABI breakage.

Change-Id: I3856fdc958a6234fe5e0a888733ce9f57fa5a48e
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>