drm/i915/dp: use true,false for bool variable in intel_dp.c

Fixes coccicheck warning:

drivers/gpu/drm/i915/display/intel_dp.c:4950:1-33: WARNING: Assignment of 0/1 to bool variable
drivers/gpu/drm/i915/display/intel_dp.c:4906:1-33: WARNING: Assignment of 0/1 to bool variable
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Ma Feng <mafeng.ma@huawei.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1578013959-31486-3-git-send-email-mafeng.ma@huawei.com

drivers/gpu/drm/i915/display/intel_dp.c

@@ -4903,7 +4903,7 @@ static u8 intel_dp_autotest_video_pattern(struct intel_dp *intel_dp)
 	intel_dp->compliance.test_data.hdisplay = be16_to_cpu(h_width);
 	intel_dp->compliance.test_data.vdisplay = be16_to_cpu(v_height);
 	/* Set test active flag here so userspace doesn't interrupt things */
-	intel_dp->compliance.test_active = 1;
+	intel_dp->compliance.test_active = true;
 
 	return DP_TEST_ACK;
 }
@@ -4947,7 +4947,7 @@ static u8 intel_dp_autotest_edid(struct intel_dp *intel_dp)
 	}
 
 	/* Set test active flag here so userspace doesn't interrupt things */
-	intel_dp->compliance.test_active = 1;
+	intel_dp->compliance.test_active = true;
 
 	return test_result;
 }