* Adds 'huawei-s6750-h48y8c.front.png'
* Adds 'huawei-s6750-h48y8c.rear.png'
* Adds 'S6750-H48Y8C.yaml'
* Fix Eth's interface name on S6730-H48Y6C-V2: from MEth0/0/1 to MEth0/0/0
* Fix weight value on S5735-L48P4XE-A-V2: from 1.1 kg to 6.10 kg
* Adds part_number on S6720-30C-EI-24S-AC: 02350DMN