MdeModulePkg/Xhci: Correct the indention of comments

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
(cherry picked from commit b0b626ea2f16faca9f864599384fd184a89e0195)
1 file changed