add support for GS75 Stealth 9SF

[enigmatixator]

mostly same as GS65 Stealth, but not exactly.

[glpnk]

@enigmatixator Send EC dump please, and add full name of model, because there are few of them

[enigmatixator]

@glpnk full model name: MSI GS75 Stealth 9SF

EC dump:

$ sudo hexdump -C /sys/kernel/debug/ec/ec0/io
[sudo] password for user: 
00000000  00 80 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000020  00 00 00 00 00 00 00 00  00 00 00 b0 e0 06 5b 0f  |..............[.|
00000030  03 01 00 0d 30 0a 05 00  a0 14 60 3b 10 02 c0 00  |....0.....`;....|
00000040  50 0a 4c 00 28 0e 00 00  bc 0a 2c 3d 03 0c f8 43  |P.L.(.....,=...C|
00000050  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000060  00 00 00 00 00 00 00 00  31 00 37 40 46 4c 52 58  |........1.7@FLRX|
00000070  64 28 00 28 30 38 40 48  50 00 08 03 03 03 03 03  |d(.(08@HP.......|
00000080  31 00 37 3d 41 47 4d 57  5e 00 00 30 38 40 48 4f  |1.7=AGMW^..08@HO|
00000090  56 00 08 03 03 03 03 05  02 00 7d 02 00 64 00 00  |V.........}..d..|
000000a0  31 37 47 31 45 4d 53 31  2e 31 30 37 30 37 31 32  |17G1EMS1.1070712|
000000b0  32 30 31 39 30 39 3a 34  32 3a 31 38 24 0e 40 00  |201909:42:18$.@.|
000000c0  00 01 25 00 00 9e c0 00  00 58 00 00 00 94 14 00  |..%......X......|
000000d0  00 00 40 00 70 80 00 00  00 00 00 80 00 00 00 00  |..@.p...........|
000000e0  e2 02 00 24 d4 00 00 00  00 00 00 0f 00 9a 00 d0  |...$............|
000000f0  00 00 c1 80 8d 80 05 00  00 00 32 00 00 00 00 00  |..........2.....|
00000100