1. Fix a bug to initialize the UdpRead instance in EfiPxeBcStart function.
1. Fix a bug to initialize the UdpRead instance in EfiPxeBcStart function.

Signed-off-by: sfu5
Reviewed-by: qianouyang
Reviewed-by: xdu2


git-svn-id: 5648d1bec6962b0a6d1d1b40eba8cf5cdb62da3d@12775 6f19259b-4bc3-4df7-8a09-765794883524

MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2