i2c: xilinx: Removed unnecessary set tx direction in write operation

The driver is following the Dynamic controller logic flow.
As per Dynamic controller logic flow this bit need not to be set.

Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Merge remote-tracking branch 'xilinx/master-next' into xcomm_zynq
adau17x1.c: Export adau17x1_add_routes

Compiling ADAU1761 as module failed with:
ERROR: "adau17x1_add_routes" [sound/soc/codecs/snd-soc-adau1761.ko] undefined!