remoteproc: qcom_q6v5_pas: staticize adsp_segment_dump()

adsp_segment_dump() is not used outside of this unit, so add missing
static to fix:

  drivers/remoteproc/qcom_q6v5_pas.c:108:6: warning: no previous prototype for ‘adsp_segment_dump’ [-Wmissing-prototypes]

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230507144826.193067-1-krzysztof.kozlowski@linaro.org