drm/sti: VTG interrupt names are badly displayed
drm/sti: VTG interrupt names are badly displayed

VTG interrupt names are badly displayed using "cat /proc/interrupts".
Simply use the VTG device name while registering the VTG interrupts
to fix it.

Signed-off-by: Vincent Abriou <c7c94f60d544985b756f117e3ec96ca87688c906@st.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs