[fuchsia] Migrate from protect2 to protect

These functions do the same thing, but Fuchsia will eventually remove
support for protect2.

Change-Id: I9f2b4153efa2f78238eb020e9f422f666ae5b7bb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2743635
Auto-Submit: Adam Barth <abarth@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73287}

src/base/platform/platform-fuchsia.cc

@@ -121,7 +121,7 @@ bool OS::SetPermissions(void* address, size_t size, MemoryPermission access) {
   DCHECK_EQ(0, reinterpret_cast<uintptr_t>(address) % CommitPageSize());
   DCHECK_EQ(0, size % CommitPageSize());
   uint32_t prot = GetProtectionFromMemoryPermission(access);
-  return zx::vmar::root_self()->protect2(
+  return zx::vmar::root_self()->protect(
              prot, reinterpret_cast<uintptr_t>(address), size) == ZX_OK;
 }