ci: mynewt: Update external repositories

Match version with what is now used in upstream Mynewt. Also add
ARM CMSIS which is now taken from original repo.

Signed-off-by: Szymon Janc <szymon.janc@codecoup.pl>
diff --git a/ci/mynewt_install.sh b/ci/mynewt_install.sh
index 3ea0534..3ce73a4 100755
--- a/ci/mynewt_install.sh
+++ b/ci/mynewt_install.sh
@@ -36,11 +36,15 @@
     [[ $? -ne 0 ]] && exit 1
 
     # nrfx is now taken from original repository
-    git clone --depth=1 --branch v2.8.0 https://github.com/NordicSemiconductor/nrfx.git repos/nordic-nrfx
+    git clone --depth=1 --branch v3.3.0 https://github.com/NordicSemiconductor/nrfx.git repos/nordic-nrfx
     [[ $? -ne 0 ]] && exit 1
 
     # Mbed-TLS is now taken from original repository
-    git clone --depth=1 --branch v2.28.3 https://github.com/Mbed-TLS/mbedtls.git repos/mbedtls
+    git clone --depth=1 --branch v2.28.4 https://github.com/Mbed-TLS/mbedtls.git repos/mbedtls
+    [[ $? -ne 0 ]] && exit 1
+
+    # CMSIS is now taken from original repository
+    git clone --depth=1 --branch 5.4.0 https://github.com/ARM-software/CMSIS_5.git repos/arm-CMSIS_5
     [[ $? -ne 0 ]] && exit 1
 }