arm64: dts: qcom: msm8916/39: Fix venus memory size

Both MSM8916 and MSM8939 have unnecessarily large reservations for the
venus firmware for some reason. According to the ELF headers and
downstream [1] 5 MiB is enough. Let's set the minimum size as default.

With the dynamic reserved memory allocations boards can easily override
this if needed, although in practice there does not seem to be any
device with a different venus firmware size.

[1]: https://git.codelinaro.org/clo/la/kernel/msm-3.10/-/blame/LA.BR.1.2.9.1-02310-8x16.0/arch/arm/boot/dts/qcom/msm8939-common.dtsi#L69Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20230911-msm8916-rmem-v1-9-b7089ec3e3a1@gerhold.netSigned-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm64/boot/dts/qcom/msm8916.dtsi

@@ -98,7 +98,7 @@ wcnss_mem: wcnss {
 		};
 
 		venus_mem: venus {
-			size = <0x0 0x600000>;
+			size = <0x0 0x500000>;
 			alignment = <0x0 0x100000>;
 			alloc-ranges = <0x0 0x86800000 0x0 0x8000000>;
 			no-map;

arch/arm64/boot/dts/qcom/msm8939.dtsi

@@ -370,7 +370,7 @@ wcnss_mem: wcnss {
 		};
 
 		venus_mem: venus {
-			size = <0x0 0x800000>;
+			size = <0x0 0x500000>;
 			alignment = <0x0 0x100000>;
 			alloc-ranges = <0x0 0x86800000 0x0 0x8000000>;
 			no-map;