[Why]
Enhanced sync need to use vertical_interrupt1.

[How]
Add vertical_interrupt1 source to irq manger,
Implment setup vline interrupt interface.
Signed-off-by: Fatemeh Darbehani <fatemeh.darbehani@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>