[PowerPC] fix trivial typos in comment, NFC

llvm-svn: 334583
diff --git a/llvm/lib/Target/PowerPC/PPCTLSDynamicCall.cpp b/llvm/lib/Target/PowerPC/PPCTLSDynamicCall.cpp
index 903d4e9..ac36abb 100644
--- a/llvm/lib/Target/PowerPC/PPCTLSDynamicCall.cpp
+++ b/llvm/lib/Target/PowerPC/PPCTLSDynamicCall.cpp
@@ -108,7 +108,7 @@
         }
 
         // We create ADJCALLSTACKUP and ADJCALLSTACKDOWN around _tls_get_addr
-        // as schduling fence to avoid it is scheduled before
+        // as scheduling fence to avoid it is scheduled before
         // mflr in the prologue and the address in LR is clobbered (PR25839).
         // We don't really need to save data to the stack - the clobbered
         // registers are already saved when the SDNode (e.g. PPCaddiTlsgdLAddr)