[NFC][RISCV][format] Blank line between functions, remove unnecessary semicolon.

Author: NexMing

llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h

@@ -222,6 +222,7 @@ class RISCVTTIImpl : public BasicTTIImplBase<RISCVTTIImpl> {
  }
  llvm_unreachable("unknown register class");
  }
+
  unsigned getRegisterClassForType(bool Vector, Type *Ty = nullptr) const {
  if (Vector)
  return RISCVRegisterClass::VRRC;
@@ -236,7 +237,8 @@ class RISCVTTIImpl : public BasicTTIImplBase<RISCVTTIImpl> {
  }
 
  return RISCVRegisterClass::GPRRC;
- };
+ }
+
  const char *getRegisterClassName(unsigned ClassID) const {
  switch (ClassID) {
  case RISCVRegisterClass::GPRRC: