drm/msm/dpu: Remove unused INTF0 interrupt mask from SM6115/QCM2290

Neither of these SoCs has INTF0, they only have a DSI interface on index
1.  Stop enabling an interrupt that can't fire.

Fixes: 3581b706 ("drm/msm/disp/dpu1: add support for display on SM6115")
Fixes: 5334087e

 ("drm/msm: add support for QCM2290 MDSS")
Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/534204/
Link: https://lore.kernel.org/r/20230411-dpu-intf-te-v4-1-27ce1a5ab5c6@somainline.org
Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>