svc: Fix typo in comments added in commit a93ba0f

The codec control that sets the number of spatial layers is
AOME_SET_NUMBER_SPATIAL_LAYERS, not AOME_SET_SPATIAL_LAYER_ID.

Bug: 503975732, 503993984, 503993985
Change-Id: Idd801c4c244fee1a771d486fa605ea53352b44cd

aom/aomcx.h

diff --git a/aom/aomcx.h b/aom/aomcx.h
index 1c344f7..5d6d20f 100644
--- a/aom/aomcx.h
+++ b/aom/aomcx.h
@@ -200,7 +200,7 @@
   /*!\brief Codec control function to set encoder spatial layer id, int
    * parameter. Spatial layer id must be within valid range of 0 to the
    * allowed number of spatial layers, set via the control
-   * AV1E_SET_SVC_PARAMS, or via AOME_SET_SPATIAL_LAYER_ID.
+   * AV1E_SET_SVC_PARAMS, or via AOME_SET_NUMBER_SPATIAL_LAYERS.
    */
   AOME_SET_SPATIAL_LAYER_ID = 12,
 
@@ -1293,7 +1293,7 @@
   /*!\brief Codec control function to set the layer id, aom_svc_layer_id_t*
    * parameter. Layer id for spatial or temporal layer must be within valid
    * range of 0 to the allowed number of spatial or temporal layers, set via
-   * the control AV1E_SET_SVC_PARAMS, or via AOME_SET_SPATIAL_LAYER_ID.
+   * the control AV1E_SET_SVC_PARAMS, or via AOME_SET_NUMBER_SPATIAL_LAYERS.
    */
   AV1E_SET_SVC_LAYER_ID = 131,