[RISCV] Rename a lambda to have plural nouns to reflect that it contains a loop. NFC

storeRegToStackSlot contains a loop that stores multiple registers
to multiple slots.

Author: topperc

llvm/lib/Target/RISCV/RISCVFrameLowering.cpp

@@ -1785,7 +1785,7 @@ bool RISCVFrameLowering::spillCalleeSavedRegisters(
   const auto &UnmanagedCSI = getUnmanagedCSI(*MF, CSI);
   const auto &RVVCSI = getRVVCalleeSavedInfo(*MF, CSI);
 
-  auto storeRegToStackSlot = [&](decltype(UnmanagedCSI) CSInfo) {
+  auto storeRegsToStackSlots = [&](decltype(UnmanagedCSI) CSInfo) {
     for (auto &CS : CSInfo) {
       // Insert the spill to the stack frame.
       Register Reg = CS.getReg();
@@ -1794,8 +1794,8 @@ bool RISCVFrameLowering::spillCalleeSavedRegisters(
                               CS.getFrameIdx(), RC, TRI, Register());
     }
   };
-  storeRegToStackSlot(UnmanagedCSI);
-  storeRegToStackSlot(RVVCSI);
+  storeRegsToStackSlots(UnmanagedCSI);
+  storeRegsToStackSlots(RVVCSI);
 
   return true;
 }