MdePkg/BaseSynchronizationLib GCC: fix whitespace and comments

MdePkg/BaseSynchronizationLib GCC: fix whitespace and comments

The "GccInline.c" files have some inconsistent whitespace, and missing (or
incorrect) operand comments. Fix and unify them.

This patch doesn't change behavior.

Cc: Liming Gao <liming.gao@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1208
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>