gpu: nvgpu: gp10b: correct initial gpcclk rate

Set initial gpcclk rate to 1GHz.

Bug 200151332

Reviewed-on: http://git-master/r/834113
(cherry picked from commit 9ed69164da7afeec20c3a557885f74db4cbea9cb)

Change-Id: I85107eb5852b25977b30663f6ae173b271ecafeb
Signed-off-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-on: http://git-master/r/834322
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

drivers/gpu/nvgpu/gp10b/platform_gp10b_tegra.c

@@ -34,7 +34,7 @@ static struct {
 	char *name;
 	unsigned long default_rate;
 } tegra_gp10b_clocks[] = {
-	{"gpu", 1900000000},
+	{"gpu", 1000000000},
 	{"gpu_sys", 204000000} };
 
 /*