drm/msm/dp: don't touch DP subconnector property in eDP case

drm/msm/dp: don't touch DP subconnector property in eDP case

In case of the eDP connection there is no subconnetor and as such no
subconnector property. Put drm_dp_set_subconnector_property() calls
under the !is_edp condition.

Fixes: bfcc3d8f94f4 ("drm/msm/dp: support setting the DP subconnector type")
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Tested-by: Jessica Zhang <quic_jesszhan@quicinc.com> # SC7280
Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
Tested-by: Johan Hovold <johan+linaro@kernel.org>
Patchwork: https://patchwork.freedesktop.org/patch/564284/
Link: https://lore.kernel.org/r/20231025092711.851168-2-dmitry.baryshkov@linaro.org
Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>