arm: defconfig: Enable PCI Express AER driver

Enable this driver to allow using standard APIs
to enable and disable AER support in endpoint
driver. In order to enable this driver
CONFIG_PCI_QTI needs to be enabled to prevent
GKI ABI breakage for GKI enabled configuration.

Change-Id: Icec7e6b10a7449d7dcf011afd73e1c573c16c8c5
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>