MdePkg: Add P2P Bridge Secondary Latency Timer register definition
MdePkg: Add P2P Bridge Secondary Latency Timer register definition

Add P2P Bridge Secondary Latency Timer register definition to Pci22.h

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Samer El-Haj-Mahmoud <samer.el-haj-mahmoud@hp.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

git-svn-id: 3158a46dfd52e07d1fda3e32e1ab2e353a00b20f@17793 6f19259b-4bc3-4df7-8a09-765794883524

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