drivers/iio/frequency/cf_axi_dds_buffer_stream: Update for V8.0.0a and fix buffer bug

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
arch/arm/boot/dts/zynq-zc706-adv7511-ad9361-fmcomms5.dts: use cyclic mode

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Merge branch 'xcomm_zynq_new_pcore_regmap' of https://github.com/analogdevicesinc/linux into xcomm_zynq_new_pcore_regmap