MAINTAINERS: icc: add interconnect tree

MAINTAINERS entry for ICC is missing the tree details, so add it.

Signed-off-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20210328171618.2759956-1-vkoul@kernel.org


Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>