drm/amdgpu/jpeg: Clean up errors in vcn_v1_0.c

Fix the following errors reported by checkpatch:

ERROR: space required before the open parenthesis '('
ERROR: space prohibited after that '~' (ctx:WxW)

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