#### Why I did it
Support API 2.0 for S5248F platform
#### How I did it
Making changes to S5248F platform specific directory
Co-authored-by: Arun LK <Arun_L_K@dell.com>
- Make DellEMC platform modules Python3 compliant.
- Change return type of PSU Platform APIs in DellEMC Z9264, S5232 and Thermal Platform APIs in S5232 to 'float'.
- Remove multiple copies of pcisysfs.py.
- PEP8 style changes for utility scripts.
- Build and install Python3 version of sonic_platform package.
- Fix minor Platform API issues.