Add support for Samsung Galaxy (Note 7 & S7 & S7 Edge)

[playday3008]

Added:

• Samsung Galaxy Note 7 (2016) - graceqlte
• Samsung Galaxy S7 (2016) - herolte
• Samsung Galaxy S7 Edge (2016) - hero2lte

Testing on Note 7:
What works:

• Boot into lk2nd
• Screen (kinda, see what not works)
• Buttons

What doesn't work:

• Screen when using DEBUG_FBCON=1, it's just looks like corrupted framebuffer
• Booting stock boot image (really have no idea, kernel logs are absent, but they do show up when booting directly (not through lk2nd)).

Notes:

• fastboot kinda quirky, sometimes work, sometimes no, reconnecting cable seems to fix it

Photos

Normal boot:

With DEBUG_FBCON=1

[playday3008]

Here's stock kernel for reference: https://github.com/jcadduono/android_kernel_samsung_msm8996

[playday3008]

Well, now it kind of boots the stock kernel, but bootloops, so, IDK. Kernel outputs no logs to investigate when booting through lk2nd, but shows logs when booting normally, strange. I would like to investigate, but I don't know where to even begin.