Docker env for Arm® Ethos™-U55 Port

* Removes /opt/arm/cmake/bin from the path
* Parameterizes Arm® Ethos™-U55 driver stack version number

Change-Id: I2162b40f82241fd013643cbfa8847b60d7f4f5a1

Author: grant-arm

docker/Dockerfile.ci_cpu

@@ -118,4 +118,4 @@ COPY install/ubuntu_install_vela.sh /install/ubuntu_install_vela.sh
 RUN bash /install/ubuntu_install_vela.sh
 
 # Update PATH
-ENV PATH /opt/arm/bin:/opt/arm/cmake/bin:/opt/arm/gcc-arm-none-eabi/bin:$PATH
+ENV PATH /opt/arm/bin:/opt/arm/gcc-arm-none-eabi/bin:$PATH

docker/install/ubuntu_install_ethosu_driver_stack.sh

@@ -23,6 +23,7 @@ set -o pipefail
 fvp_dir="/opt/arm/FVP_Corstone_SSE-300_Ethos-U55"
 cmake_dir="/opt/arm/cmake"
 ethosu_dir="/opt/arm/ethosu"
+ethosu_driver_ver="21.05"
 
 mkdir -p /opt/arm
 
@@ -79,15 +80,15 @@ mkdir "${ethosu_dir}"
 cd "${ethosu_dir}"
 git clone "https://review.mlplatform.org/ml/ethos-u/ethos-u-core-driver" core_driver
 cd core_driver
-git checkout tags/21.05
+git checkout tags/${ethosu_driver_ver}
 
 cd "${ethosu_dir}"
 git clone "https://review.mlplatform.org/ml/ethos-u/ethos-u-core-platform" core_platform
 cd core_platform
-git checkout tags/21.05
+git checkout tags/${ethosu_driver_ver}
 
 # Clone CMSIS
 cd "${ethosu_dir}"
 git clone "https://github.com/ARM-software/CMSIS_5.git" cmsis
 cd cmsis
-git checkout -f tags/5.7.0
+git checkout -f tags/5.7.0