Add reorder-python-import pre-commit hook

Also updated README.md

Change-Id: I118309c61f4d00e8508d6b888c606995490fba39
Signed-off-by: Diego Russo <diego.russo@arm.com>
diff --git a/ethosu/vela/driver_actions.py b/ethosu/vela/driver_actions.py
index bd15af2..79ac11a 100644
--- a/ethosu/vela/driver_actions.py
+++ b/ethosu/vela/driver_actions.py
@@ -13,16 +13,15 @@
 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
-
 # Description:
 # Creates driver actions that are embedded in the custom operator payload.
-
 from typing import List
 
 import numpy as np
 
-from .ethos_u55_regs.ethos_u55_regs import config_r, id_r, ARCH_VER
+from .ethos_u55_regs.ethos_u55_regs import ARCH_VER
+from .ethos_u55_regs.ethos_u55_regs import config_r
+from .ethos_u55_regs.ethos_u55_regs import id_r
 
 
 class DACommands: