SecurityPkg OpalPasswordPei: Go next when AhciModeInitialize is failed

SecurityPkg OpalPasswordPei: Go next when AhciModeInitialize is failed

Go to next loop instead of going to unlock OPAL password when
AhciModeInitialize is failed.

It is just error handling.

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Chao Zhang <chao.b.zhang@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>