[flags][cleanup] Fix some misspellings of TurboFan

Some flag comments and descriptions contained "Turbofan" instead of
"TurboFan".

R=ahaas@chromium.org

Bug: v8:11879
Change-Id: I7e4c6a8820b6ab31eb2f868641a20004faf7104a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2985401Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75385}

src/flags/flag-definitions.h

@@ -838,12 +838,12 @@ DEFINE_BOOL(turbo_verify_allocation, DEBUG_BOOL,
             "verify register allocation in TurboFan")
 DEFINE_BOOL(turbo_move_optimization, true, "optimize gap moves in TurboFan")
 DEFINE_BOOL(turbo_jt, true, "enable jump threading in TurboFan")
-DEFINE_BOOL(turbo_loop_peeling, true, "Turbofan loop peeling")
-DEFINE_BOOL(turbo_loop_variable, true, "Turbofan loop variable optimization")
-DEFINE_BOOL(turbo_loop_rotation, true, "Turbofan loop rotation")
+DEFINE_BOOL(turbo_loop_peeling, true, "TurboFan loop peeling")
+DEFINE_BOOL(turbo_loop_variable, true, "TurboFan loop variable optimization")
+DEFINE_BOOL(turbo_loop_rotation, true, "TurboFan loop rotation")
 DEFINE_BOOL(turbo_cf_optimization, true, "optimize control flow in TurboFan")
 DEFINE_BOOL(turbo_escape, true, "enable escape analysis")
-DEFINE_BOOL(turbo_allocation_folding, true, "Turbofan allocation folding")
+DEFINE_BOOL(turbo_allocation_folding, true, "TurboFan allocation folding")
 DEFINE_BOOL(turbo_instruction_scheduling, false,
             "enable instruction scheduling in TurboFan")
 DEFINE_BOOL(turbo_stress_instruction_scheduling, false,
@@ -947,7 +947,7 @@ DEFINE_INT(trace_wasm_ast_end, 0, "end function for wasm AST trace (exclusive)")
 DEFINE_BOOL(liftoff, true,
             "enable Liftoff, the baseline compiler for WebAssembly")
 DEFINE_BOOL(liftoff_only, false,
-            "disallow Turbofan compilation for WebAssembly (for testing)")
+            "disallow TurboFan compilation for WebAssembly (for testing)")
 DEFINE_IMPLICATION(liftoff_only, liftoff)
 DEFINE_NEG_IMPLICATION(liftoff_only, wasm_tier_up)
 DEFINE_NEG_IMPLICATION(fuzzing, liftoff_only)
@@ -965,7 +965,7 @@ DEFINE_BOOL(trace_wasm_memory, false,
             "print all memory updates performed in wasm code")
 // Fuzzers use {wasm_tier_mask_for_testing} and {wasm_debug_mask_for_testing}
 // together with {liftoff} and {no_wasm_tier_up} to force some functions to be
-// compiled with Turbofan or for debug.
+// compiled with TurboFan or for debug.
 DEFINE_INT(wasm_tier_mask_for_testing, 0,
            "bitmask of functions to compile with TurboFan instead of Liftoff")
 DEFINE_INT(wasm_debug_mask_for_testing, 0,