Draft: lg-f320, pantech-ef50, pantech-ef71, samsung-tre3calte : Add support

Hello, I ported to these devices a while ago, but I was very busy so I'm uploading it now. Following devices are ported and working

LG Mobile - G2 Korea (LG-F320 / lg-f320)

Pantech Wireless - VEGA R3 (IM-A850 / pantech-ef50)

Pantech Wireless - SKY I'm Back (IM-100 / pantech-ef71)

Samsung Mobile - Galaxy Note 4 S-LTE (SM-N916 / samsung-tre3calte)

For "Galaxy Note 4 S-LTE", it has a broadcom wifi, and I attempted to fix it but failed. For "VEGA R3", it has a Qualcomm Wifi, and I attempted to fix it by injecting it's firmware blobs and successed. However, I can't make the firmware-pantech-ef50 package properly, so it is not working. Thanks!