spi: spi-geni-qcom: Suspend SPI slave after timeout

Suspend SPI slave SE after transfer timeout to avoid interrupt when
SPI Slave SE is not in a ready state.

This will allow us to handle the case in which SPI Slave RX transfer
got delayed due to some system latency and we receive RX watermark
when SPI slave is not ready for transfer.

Change-Id: I08c7c2a861285ce45a28ea1aab1db9a99016a35e
Signed-off-by: Ashish Kori <akori@codeaurora.org>