qcom: MAINTAINERS: add linux-msm IRC on OFTC

Qualcomm SoC community gathers in #linux-msm channel on OFTC, so mention
it in the maintainer entries.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20240821102602.134216-1-krzysztof.kozlowski@linaro.org


Signed-off-by: Bjorn Andersson <andersson@kernel.org>