ASoC: codecs: tas2780: remove redundant assignments to variable ret

Variable ret is being assigned a value that is never read in a couple
of places. The variable is being re-assigned later on. The assignments
are redundant and can be removed.

Cleans up clang scan build warning:
sound/soc/codecs/tas2780.c:84:2: warning: Value stored to 'ret' is
never read [deadcode.DeadStores]

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://msgid.link/r/20240411083332.304887-1-colin.i.king@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>