[NFC][AMDGPU] Restructure the AMDGPU memory model description
authorTony <Tony.Tye@amd.com>
Sat, 31 Oct 2020 04:43:55 +0000 (04:43 +0000)
committerTony <Tony.Tye@amd.com>
Mon, 2 Nov 2020 21:32:20 +0000 (21:32 +0000)
commit68160789c12099b281e6a302ea75094272d92efb
treeb03fd3d502b8898ee951ea4b46d033fd3dc8362b
parenta8ef00af43ff7d1d2158d8715b8bab3bcb2d783a
[NFC][AMDGPU] Restructure the AMDGPU memory model description

Separate the AMDGPU memory model description into separate sections
for each architecture.

Differential Revision: https://reviews.llvm.org/D90548
llvm/docs/AMDGPUUsage.rst