drm/nouveau/timer/ga10[024]: initial support

Appears to be compatible with GK20A code.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
index 4a5d43f..6a19209 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
@@ -2662,6 +2662,7 @@
 	.imem = nv50_instmem_new,
 	.mc = ga100_mc_new,
 	.pci = gp100_pci_new,
+	.timer = gk20a_timer_new,
 };
 
 static const struct nvkm_device_chip
@@ -2674,6 +2675,7 @@
 	.imem = nv50_instmem_new,
 	.mc = ga100_mc_new,
 	.pci = gp100_pci_new,
+	.timer = gk20a_timer_new,
 };
 
 static const struct nvkm_device_chip
@@ -2686,6 +2688,7 @@
 	.imem = nv50_instmem_new,
 	.mc = ga100_mc_new,
 	.pci = gp100_pci_new,
+	.timer = gk20a_timer_new,
 };
 
 static int