meson: Fix coding style when declaring arrays

The meson.build files mix array declarations with and without a space
after the opening and before the closing square bracket. The vast
majority of cases don't use spaces, so standardize on that.

While it it, fix indentation in a few places.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

test/controls/meson.build

@@ -1,10 +1,10 @@
 # SPDX-License-Identifier: CC0-1.0
 
 control_tests = [
-    [ 'control_info',               'control_info.cpp' ],
-    [ 'control_info_map',           'control_info_map.cpp' ],
-    [ 'control_list',               'control_list.cpp' ],
-    [ 'control_value',              'control_value.cpp' ],
+    ['control_info',                'control_info.cpp'],
+    ['control_info_map',            'control_info_map.cpp'],
+    ['control_list',                'control_list.cpp'],
+    ['control_value',               'control_value.cpp'],
 ]
 
 foreach t : control_tests