arm: dts: revpi-compact: Fix dout boot glitch

Customers have been reporting, that the digital outputs on RevPi Compact suffer from a short glitch during boot. This is caused by the VHC595MTCX output shift register, which sets outputs on each rising edge of RCLK (SPI CS2 on RevPi Compact).

Fix this by defining the GPIO45 (CS2) as active low in dt-blob.bin, in order to ensure that the output are only set when the driver is ready.

See https://revolutionpi.com/forum/viewtopic.php?p=15368

Signed-off-by: Nicolai Buchwitz n.buchwitz@kunbus.com