spi: img-spfi: Implement a prepare_message() callback
spi: img-spfi: Implement a prepare_message() callback

In preparation for switching to using the SPI core's CS GPIO handling,
move setup of the PORT_STATE register, which must be configured before
CS is asserted, to a prepare_message() callback.

Signed-off-by: Ezequiel Garcia <7248f52d8926fd82a5eb079a13afe9dd79e34c7a@imgtec.com>
Signed-off-by: Andrew Bresticker <6f9d97df82107736b1c4f0e11d74242c25499ec8@chromium.org>
Signed-off-by: Mark Brown <b51b9a92386687a9ac927cebfa0f978adeb8cea5@kernel.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs