ASoC: qcom: lpass-cpu: mark IRQ_CLEAR register as volatile and readable

ASoC: qcom: lpass-cpu: mark IRQ_CLEAR register as volatile and readable

Currently IRQ_CLEAR register is marked as write-only, however using
regmap_update_bits on this register will have some side effects.
so mark IRQ_CLEAR register appropriately as readable and volatile.

Fixes: da0363f7bfd3 ("ASoC: qcom: Fix for DMA interrupt clear reg overwriting")
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Srinivasa Rao Mandadapu <srivasam@codeaurora.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210624092153.5771-1-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>