SW-4988: spi: rename rdwr field to xfer_flags
SW-4988: spi: rename rdwr field to xfer_flags

This is already done for greybus and thus breaks gbsim's build. Fix it.

Signed-off-by: Viresh Kumar <5ff32272b3d9f86512eddc8e0af523fc6f7924e5@linaro.org>
Reviewed-by: Rui Miguel Silva <f529045c86d2c13bbdfc6f0cc7c0e057c243b006@linaro.org>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@google.com>

projectara/gbsim,gregkh/gbsim,gregkh/gbsim,projectara/gbsim