sdm: Fix Qservice command description.

Change-Id: I11b11c6b11c0106fcee7306eeef360d28c014321
CRs-Fixed: 2495765
diff --git a/libqservice/IQService.h b/libqservice/IQService.h
index e19eccc..a4aaeec 100644
--- a/libqservice/IQService.h
+++ b/libqservice/IQService.h
@@ -59,7 +59,7 @@
         /* Enable/Disable/Set refresh rate dynamically */
         CONFIGURE_DYN_REFRESH_RATE = 18,
         CONTROL_PARTIAL_UPDATE = 19,   // Provides ability to enable/disable partial update
-        TOGGLE_SCREEN_UPDATES = 20, // Provides ability to set the panel brightness
+        TOGGLE_SCREEN_UPDATES = 20, // Provides ability to pause/resume display updates
         SET_FRAME_DUMP_CONFIG = 21,  // Provides ability to set the frame dump config
         SET_S3D_MODE = 22, // Set the 3D mode as specified in msm_hdmi_modes.h
         CONNECT_HDMI_CLIENT = 23,  // Connect HDMI CEC HAL Client