interconnect: qcom: Implement xlate_extended() to parse tags

interconnect: qcom: Implement xlate_extended() to parse tags

Implement a function to parse the arguments of the "interconnects" DT
property and populate the interconnect path tags if this information
is available.

Tested-by: Sibi Sankar <sibis@codeaurora.org>
Reviewed-by: Sibi Sankar <sibis@codeaurora.org>
Link: https://lore.kernel.org/r/20200903133134.17201-4-georgi.djakov@linaro.org
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>