Remove warning: default label in switch which covers all enumeration values [-Wcovered-switch-default]

Author: silee2

mlir/lib/Conversion/XeVMToLLVM/XeVMToLLVM.cpp

@@ -125,8 +125,6 @@ int32_t getL1CacheControl(OpType op) {
     case LoadCacheControl::INVALIDATE_READ:
       control = 4;
       break;
-    default:
-      break;
     }
   } else {
     switch (*op.getCacheControl()) {
@@ -153,8 +151,6 @@ int32_t getL1CacheControl(OpType op) {
     case StoreCacheControl::L1WB_L2UC_L3WB:
       control = 4;
       break;
-    default:
-      break;
     }
   }
   return control;
@@ -184,8 +180,6 @@ int32_t getL3CacheControl(OpType op) {
     case LoadCacheControl::INVALIDATE_READ:
       control = 4;
       break;
-    default:
-      break;
     }
   } else {
     switch (*op.getCacheControl()) {
@@ -208,8 +202,6 @@ int32_t getL3CacheControl(OpType op) {
     case StoreCacheControl::L1WB_L2UC_L3WB:
       control = 2;
       break;
-    default:
-      break;
     }
   }
   return control;