spi: spi-cadence: Add Slave mode support

Merge series from Srinivas Goud <srinivas.goud@amd.com>:

Currently SPI Cadence controller works in Master mode only.
Update driver to support Slave mode and also Full duplex transfer
support in Slave mode
This commit is contained in:
Mark Brown 2023-04-18 17:19:48 +01:00
commit 01875342ae
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