ASoC: sh: rcar: ssi: remove redundant assignment

cppcheck warning:

sound/soc/sh/rcar/ssi.c:403:6: style: Redundant initialization for
'wsr'. The initialized value is overwritten before it is
read. [redundantInitialization]
 wsr = ssi->wsr;
     ^
sound/soc/sh/rcar/ssi.c:372:11: note: wsr is initialized
 u32 wsr  = ssi->wsr;
          ^
sound/soc/sh/rcar/ssi.c:403:6: note: wsr is overwritten
 wsr = ssi->wsr;
     ^

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210219231635.5749-7-pierre-louis.bossart@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>