Fix the following errors reported by checkpatch:

ERROR: space prohibited before that close parenthesis ')'
ERROR: need consistent spacing around '<<' (ctx:WxV)
ERROR: need consistent spacing around '-' (ctx:WxV)
Signed-off-by: GuoHua Chen <chenguohua_716@163.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>