spi: cadence: Add static PHY configuration in Marvell overlay

This commit adds support for static PHY configuration of Cadence xSPI
block. Configuration will be applied only if Marvell overlay compatible
string will be detected. Configuration is static over the whole
frequency range.

Signed-off-by: Witold Sadowski <wsadowski@marvell.com>
Link: https://patch.msgid.link/20240724154739.582367-3-wsadowski@marvell.com


Signed-off-by: Mark Brown <broonie@kernel.org>