drm/i915: Fix SDVO CREATE_PREFERRED_INPUT_TIMING command

This brings fix commit acde0ef683 from 2D driver.

Signed-off-by: Zhenyu Wang <zhenyu.z.wang@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 31cd9b8..ea311c7 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -589,9 +589,12 @@
 	struct intel_sdvo_preferred_input_timing_args args;
 	uint8_t status;
 
+	memset(&args, 0, sizeof(args));
 	args.clock = clock;
 	args.width = width;
 	args.height = height;
+	args.interlace = 0;
+	args.scaled = 0;
 	intel_sdvo_write_cmd(output, SDVO_CMD_CREATE_PREFERRED_INPUT_TIMING,
 			     &args, sizeof(args));
 	status = intel_sdvo_read_response(output, NULL, 0);