linux-phytec-ti

PCI: keystone: Limit MRRS of downstream devices to 128 Bytes

Memory read transactions (initiated from downstream devices) fail
with PCI controller in AM654 PG1.0 when MRRS is set to more than
128 Bytes. Force the MRRS to 128 Bytes in all downstream devices
here. This issue will be fixed in PG2.0.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>