Xtensa.td feature typo (LLVM-97)

[MabezDev]

llvm-project/llvm/lib/Target/Xtensa/Xtensa.td

Line 100 in 36dbc8b

def FeatureMEMCTL : SubtargetFeature<"atomctl", "HasMEMCTL", "true",

should say "memctl", not "atomctl"

[KerryRJ]

Another one, should say "highpriinterrupts" and not "exception"

def FeatureHighPriInterrupts : SubtargetFeature<"exception",
                                                "HasHighPriInterrupts", "true",
                                                "Enable Xtensa HighPriInterrupts option">;