drm/bridge: Fix error handling in analogix_dp_probe

In the error handling path, the clk_prepare_enable() function
call should be balanced by a corresponding 'clk_disable_unprepare()'
call, as already done in the remove function.

Fixes: 3424e3a4

 ("drm: bridge: analogix/dp: split exynos dp driver to bridge directory")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Robert Foss <robert.foss@linaro.org>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220420011644.25730-1-linmq006@gmail.com