drm/msm: Remove depends on interconnect

The dependency on interconnect in the Kconfig was introduced to avoid
the case of interconnect=m and driver=y, but the interconnect framework
has been converted from tristate to bool now. Remove the dependency as
the framework can't be a module anymore.

Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>