ASoC: qdsp6: q6asm: fix cppcheck warnings for unnecessary initialization

cppcheck reports below warning.
q6asm.c:1631: (style) Variable 'port' is reassigned a value before the
old one has been used.

This is due to unnecessary initialization of variable port, which is
now removed as part of this patch.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210809123137.14456-2-srinivas.kandagatla@linaro.org


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