drm/amd/pm: Clean up errors in smu_v13_0_7_ppt.c

Fix the following errors reported by checkpatch:

ERROR: open brace '{' following struct go on the same line
ERROR: spaces required around that '=' (ctx:VxW)
ERROR: that open brace { should be on the previous line

Signed-off-by: Ran Sun <sunran001@208suo.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>