Update .bazelversion to 6.2.1

- Minor patch in kelvin.bzl for API change

Change-Id: If6dfe785dfb4b5057f94d0574816c56b09c124dd

.bazelrc

diff --git a/.bazelrc b/.bazelrc
index 8c3f5e9..a7bbfc0 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -16,3 +16,5 @@
 build --copt=-DTF_LITE_USE_GLOBAL_MAX
 build --copt=-DTF_LITE_MCU_DEBUG_LOG
 build:opt --copt=-DTF_LITE_STRIP_ERROR_STRINGS
+
+build --use_top_level_targets_for_symlinks=false

.bazelversion

diff --git a/.bazelversion b/.bazelversion
index ac14c3d..024b066 100644
--- a/.bazelversion
+++ b/.bazelversion
@@ -1 +1 @@
-5.1.1
+6.2.1

build_tools/bazel/kelvin.bzl

diff --git a/build_tools/bazel/kelvin.bzl b/build_tools/bazel/kelvin.bzl
index a88afbe..7a125c8 100644
--- a/build_tools/bazel/kelvin.bzl
+++ b/build_tools/bazel/kelvin.bzl
@@ -71,7 +71,7 @@
         OutputGroupsInfo to allow definition of filegroups
         containing the output ELF and BIN.
     """
-    cc_toolchain = find_cc_toolchain(ctx).cc
+    cc_toolchain = find_cc_toolchain(ctx)
     feature_configuration = cc_common.configure_features(
         ctx = ctx,
         cc_toolchain = cc_toolchain,

platforms/registration.bzl

diff --git a/platforms/registration.bzl b/platforms/registration.bzl
index e85f806..6636c4e 100644
--- a/platforms/registration.bzl
+++ b/platforms/registration.bzl
@@ -15,5 +15,4 @@
 """Kelvin toolchain registration."""
 
 def kelvin_register_toolchain(name = "kelvin"):
-    native.register_execution_platforms("@kelvin_sw//platforms/riscv32:kelvin")
     native.register_toolchains("@kelvin_sw//toolchains/kelvin:all")