linux-phytec-ti

dmaengine: ti: k3-navss-udma: Reset flowid range when no extra flows needed

The reset value of FLOWID_CNT in RCHAN_RFLOW_RNG register is 0x4000. If
no extra flows are desired for the rchan this has to be reset to 0.

Make the fliwid_cnt/_start as valid which will reset the flowid_cnt in case
extra flows are not needed for the channel.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>