arm64: dts: qcom: Remove unused panel definitions

FP3 uses HX83112B display and not any of the others added by Qualcomm.

Also remove some unused properties from &mdss_dsi1 since it's disabled
anyways.

Issue: FP3-A13#71
Change-Id: I2115402b3a57dfccd82128f7738fc6ab990b0eea