spi: spi-geni-qcom: Allow MISO<->MOSI connectivity for slave pins

Default connectivity which driver currently supports is MISO
to MISO and MOSI and MOSI. This change allows to support MISO
to MOSI connected slave. which can be selected using dt
node - slv-cross-connected.

Change-Id: I66ca5c2f851f8e3d1485580486cd2900a3756341
Signed-off-by: ashish kori <akori@codeaurora.org>