[RISCV] Simplify some predicate functions in RISCVSubtarget.h. NFC

Remove some redundancy.

HasStdExtZve32f implies HasStdExtF
HasStdExtZve64d implies HasStdExtD
HasStdExtZvfbfwma implies HasStdExtZvfbfmin

Author: topperc

llvm/lib/Target/RISCV/RISCVSubtarget.h

@@ -124,7 +124,7 @@ class RISCVSubtarget : public RISCVGenSubtargetInfo {
     return hasStdExtZfhOrZfhmin() || hasStdExtZhinxOrZhinxmin();
   }
   bool hasHalfFPLoadStoreMove() const {
-    return HasStdExtZfh || HasStdExtZfhmin || HasStdExtZfbfmin;
+    return hasStdExtZfhOrZfhmin() || HasStdExtZfbfmin;
   }
   bool is64Bit() const { return IsRV64; }
   MVT getXLenVT() const { return XLenVT; }
@@ -167,13 +167,9 @@ class RISCVSubtarget : public RISCVGenSubtargetInfo {
   bool hasVInstructions() const { return HasStdExtZve32x; }
   bool hasVInstructionsI64() const { return HasStdExtZve64x; }
   bool hasVInstructionsF16() const { return HasStdExtZvfh; }
-  bool hasVInstructionsBF16() const { 
-    return HasStdExtZvfbfmin || HasStdExtZvfbfwma; 
-  }
-  // FIXME: Consider Zfinx in the future
-  bool hasVInstructionsF32() const { return HasStdExtZve32f && HasStdExtF; }
-  // FIXME: Consider Zdinx in the future
-  bool hasVInstructionsF64() const { return HasStdExtZve64d && HasStdExtD; }
+  bool hasVInstructionsBF16() const { return HasStdExtZvfbfmin; }
+  bool hasVInstructionsF32() const { return HasStdExtZve32f; }
+  bool hasVInstructionsF64() const { return HasStdExtZve64d; }
   // F16 and F64 both require F32.
   bool hasVInstructionsAnyF() const { return hasVInstructionsF32(); }
   bool hasVInstructionsFullMultiply() const { return HasStdExtV; }