RTC6226: disable the RDS during scan operation

RDS enable is set during scanning and it causing the
incorrect register update for rtc6226 chip and this
leads to no audio issue.
Set the RDS enable bit to 0 before scanning and
set to 1 after scanning finishes.

CRs-Fixed: 2744378
Change-Id: I2c2fae1e01fb1fadccbc9133f472fca996bc2496
Signed-off-by: himta ram <hram@codeaurora.org>