[Improvement-WIP] To add PlatformMemoryMapLib separately for each msm8998 device

[qaz6750]

Description

msm8998

• All : To add PlatformMemoryMapLib separately for each device

• After testing, it works well in oneplus5

  Checklist

• [x] Have you tested the change you are submitting?

• [x] the commits history nice and clean?

[strongtz]

Sophon approved these changes now

[strongtz]

Molly's cat also approved these changes