DocBook/drm: Clean up code comment

Signed-off-by: Michael Witten <mfwitten@gmail.com>
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index ce045a8..acf4ea8 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -785,8 +785,8 @@
 };
 
 static struct drm_driver driver = {
-	/* don't use mtrr's here, the Xserver or user space app should
-	 * deal with them for intel hardware.
+	/* Don't use MTRRs here; the Xserver or userspace app should
+	 * deal with them for Intel hardware.
 	 */
 	.driver_features =
 	    DRIVER_USE_AGP | DRIVER_REQUIRE_AGP | /* DRIVER_USE_MTRR |*/