Add Memshare service for GPS

[TravMurav]

I still need to:

• Decide if memshare actually needs it's own dir
• maybe reword message definition comments a bit so they look better
• maybe rename macro consts
• break lines so they are less than 80/100
• enable it in defconfig
• check if it works as module
• drop debug messages OR make them dev_dbg
• Reword Kconfig
• fix Dt commit
• add dt binding docs and headers, replace DHMS_MEM_PROC_MPSS_V01 comment

Tested devices:

• crackling (by travmurav)
• a3lte (by travmurav)
• a5lte (by grimler)
• serranovelte (@Minecrell)
• z00l (?)
• z010d (?)
• m216
• l8910
• harpia
• osprey
• wt865x8
• wt88047 (@Minecrell)

https://gist.github.com/TravMurav/db8c8eb2e8bccf5ed46beefb0b5738d4

[TravMurav]

@antony-jr I don't think SIM will change much, GPS should work (mostly) regardless of the modem state. There may be something custom in the device that is required for GPS to work though

[stephan-gh]

@antony-jr

Should I test the GPS with the SIM inserted because up until now I've been testing without SIM?

If you are interested in debugging this further I could give a few more suggestions of things to try on Matrix/IRC (bit annoying to list them all here). But there is also the possibility that it's something very ASUS-special or something that will be fairly hard to figure out.

[antony-jr]

@antony-jr

Should I test the GPS with the SIM inserted because up until now I've been testing without SIM?

If you are interested in debugging this further I could give a few more suggestions of things to try on Matrix/IRC (bit annoying to list them all here). But there is also the possibility that it's something very ASUS-special or something that will be fairly hard to figure out.

Thanks. I will ping you after doing my tests further with SIM and data outside.