Platform/ARM/SgiPkg: Disable use of deprecated APIs
Add the `DISABLE_NEW_DEPRECATED_INTERFACES` build option in DSC file to
make sure that the deprecated APIs are not used SgiPkg.
Signed-off-by: Vijayenthiran Subramaniam <vijayenthiran.subramaniam@arm.com>
Reviewed-by: Leif Lindholm <leif@nuviainc.com>