drm/msm/hdmi: Avoid double error print on msm_hdmi_get_phy() failure

drm/msm/hdmi: Avoid double error print on msm_hdmi_get_phy() failure

msm_hdmi_get_phy() already prints error messages on each error path
using dev_err_probe(), so final DRM_DEV_ERROR() would duplicate it and
possibly flood the dmesg on probe deferrals.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/711168/
Link: https://lore.kernel.org/r/20260311-drm-msm-hdmi-cleanup-v1-2-c5535245f6de@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>