PCI: xgene: Fix CRS SV comment
Configuration Request Retry Status ("CRS") must be supported by all PCIe
devices. CRS Software Visibility is an optional feature that enables a
Root Port to make CRS visible to software by returning a special data value
to complete a config read.
Clarify a comment to say that it is "CRS SV", not "CRS", that can be
enabled.
Link: https://lore.kernel.org/r/20210126213503.2922848-1-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
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