Modify skip condition due to replacement of asic about Nokia-7215 (#6401

)

What is the motivation for this PR?
Asic of Nokia-7215 was replaced by sonic-net/sonic-buildimage#12148, which will cause skip failure about Nokia-7215

How did you do it?
Modify skip conditions.

tests/common/plugins/conditional_mark/tests_mark_conditions_platform_tests.yaml

@@ -579,7 +579,7 @@ platform_tests/broadcom:
   skip:
     reason: "Marvell devices does not support platform_tests/broadcom"
     conditions:
-      - "asic_type in ['marvell']"
+      - "'marvell' in asic_type"
 
 #######################################
 #####  cli/test_show_platform.py  #####
@@ -632,7 +632,7 @@ platform_tests/mellanox:
   skip:
     reason: "Marvell devices does not support platform_tests/mellanox"
     conditions:
-      - "asic_type in ['marvell']"
+      - "'marvell' in asic_type"
 
 #######################################
 #####    test_platform_info.py    #####