arm64: dts: qcom: msm8996-tone: Drop cont_splash_mem region

Tone does not have a functioning bootloader framebuffer and Linux allocates
the DRM framebuffer dynamically. Free up 36 MiB of precious RAM by removing
this reservation.
Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220430162319.607629-1-konrad.dybcio@somainline.org

arch/arm64/boot/dts/qcom/msm8996-sony-xperia-tone.dtsi

@@ -42,11 +42,6 @@ ramoops@a7f00000 {
 			ecc-size = <16>;
 		};
 
-		cont_splash_mem: memory@83401000 {
-			reg = <0 0x83401000 0 0x23ff000>;
-			no-map;
-		};
-
 		adsp_mem: adsp@8ea00000 {
 			reg = <0x0 0x8ea00000 0x0 0x1a00000>;
 			no-map;