T7668: Fix image update due to None kernel options

If we do not have the system options kernel the update fails
Change order for variables `k_cpu_opts` and `k_memory_opts`

If we do not have kernel_options set empty dictionary as
NoneType object has no attribue `get`

```
>>> kernel_options=None
>>> kernel_options.get('cpu', {})
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'NoneType' object has no attribute 'get'
>>>
>>>
>>> kernel_options={}
>>> kernel_options.get('cpu', {})
{}
>>>
```

1 files changed, 2 insertions, 2 deletions

diff --git a/src/op_mode/image_installer.py b/src/op_mode/image_installer.py
index 8c9d7eddd..2a9830f37 100755
--- a/src/op_mode/image_installer.py
+++ b/src/op_mode/image_installer.py
@@ -494,10 +494,10 @@ def get_cli_kernel_options(config_file: str) -> list:
     config = ConfigTree(read_file(config_file))
     config_dict = loads(config.to_json())
     kernel_options = dict_search('system.option.kernel', config_dict)
-    k_cpu_opts = kernel_options.get('cpu', {})
-    k_memory_opts = kernel_options.get('memory', {})
     if kernel_options is None:
         kernel_options = {}
+    k_cpu_opts = kernel_options.get('cpu', {})
+    k_memory_opts = kernel_options.get('memory', {})
     cmdline_options = []
 
     # XXX: This code path and if statements must be kept in sync with the Kernel