clock_control: remove Kconfig.defconfig setting of clk control drivers

Now that clock control drivers are enabled based on devicetree we
need to remove any cases of them getting enabled by Kconfig.defconfig*
files as this can lead to errors.

Typically the Kconfig.defconfig* will blindly enable a sensor and not
respect the devicetree state of the clock control.  Additionally we
can get problems with prj.conf/defconfig getting incorrectly overridden.

Signed-off-by: Kumar Gala <galak@kernel.org>