ASoC: qcom: topology: Constify pointed DAPM widget structs

ASoC: qcom: topology: Constify pointed DAPM widget structs

Few functions do not modify the pointed 'struct struct
snd_soc_dapm_widget', so the pointers can be made as pointers to const
for self-explanatory code (pointed memory is not modified by the
function) and a bit safer code.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20251219-b4-container-of-const-asoc-qcom-v2-3-05fd2ecc06fe@oss.qualcomm.com
Signed-off-by: Mark Brown <broonie@kernel.org>