ASoC: qcom: q6asm-dai: use q6asm_get_hw_pointer

ASoC: qcom: q6asm-dai: use q6asm_get_hw_pointer

make use of q6asm_get_hw_pointer to get the current hardware read/write
pointer and remove any additional code that does calculate this manually.
As this is redundant and prone to errors.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Tested-by: Alexey Klimov <alexey.klimov@linaro.org> # RB5, RB3
Link: https://patch.msgid.link/20251023102444.88158-9-srinivas.kandagatla@oss.qualcomm.com
Signed-off-by: Mark Brown <broonie@kernel.org>