PCI: qcom: Add missing reset for ipq806x

Add missing ext reset used by ipq8064 SoC in PCIe qcom driver.

Link: https://lore.kernel.org/r/20200615210608.21469-5-ansuelsmth@gmail.com


Fixes: 82a82383 ("PCI: qcom: Add Qualcomm PCIe controller driver")
Signed-off-by: Sham Muthayyan <smuthayy@codeaurora.org>
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Stanimir Varbanov <svarbanov@mm-sol.com>
Cc: stable@vger.kernel.org # v4.5+