I am also upgrading Dell Latitude E5430 to Mojave. Your shared EFI above helped me to boot. But I am not able to make my audio work till now... Please share your latest fixed EFI with audio and additional fixes here.
My configuration is as follows...
Dell Latitude E5430
Processor: Core i5-3210M 2.5GHz, BIOS version A12
Graphics: HD4000, Display: 1600x900
Experiment1 : AppleHDA.kext doesn't works for me. It doesn't recognizes sound card
Experiment2 : With VooDooHDA.kext 3.5 mm audio jack(headphones) works but not speaker sound.
I tried version 2.9.1 as well as 2.9.2 VooDooHDA.kext but still not getting speaker sound. I am not able to see speaker listing in volume properties. But I do see Speaker option in VooDooHDA settings at System Preferences > VooDooHDA.
Experiment3: I also tried to replace IOAudioFamily.kext along with VooDooHDA.kext 2.9.2 as per suggestions in blogs.