i915: remove unnecessary if

if (x) return true; else return false;
can be simplified as:
	return x;
since `x` is already a boolean expression.

Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

src/mesa/drivers/dri/i915/intel_screen.c

@@ -489,9 +489,7 @@ intel_query_image(__DRIimage *image, int attrib, int *value)
       *value = image->planar_format->components;
       return true;
    case __DRI_IMAGE_ATTRIB_FD:
-      if (drm_intel_bo_gem_export_to_prime(image->region->bo, value) == 0)
-         return true;
-      return false;
+      return !drm_intel_bo_gem_export_to_prime(image->region->bo, value);
   default:
       return false;
    }