Fixed following typos reported by Codespell

1. propogated ==> propagated
   aperatures ==> apertures
In Documentation/gpu/amdgpu/debugfs.rst

2. parition ==> partition
In Documentation/gpu/amdgpu/process-isolation.rst

3. conections ==> connections
In Documentation/gpu/amdgpu/display/programming-model-dcn.rst

In addition to above,
Fixed wrong bit-partition naming in gpu/amdgpu/process-isolation.rst
from "fourth" partition to "third" partition.

Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Suggested-by: Randy Dunlap <rdunlap@infradead.org>
Suggested-by: Alexander Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Rakuram Eswaran <rakuram.e96@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

In reference to memory carved out for APUs,
s/cave out/carve out/

Reviewed-by: shaoyun.liu <Shaoyun.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Describes what debugfs files are available and what
they are used for.

v2: fix some typos (Mark Glines)
v3: Address comments from Siqueira and Kent

Reviewed-by: Rodrigo Siqueira <siqueira@igalia.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>