samples: wifi: Fix 54 series twister definitions

Fix shield support handling for 54 series targets.

Signed-off-by: Triveni Danda <[email protected]>

Author: D-Triveni

samples/wifi/scan/sample.yaml

@@ -50,7 +50,7 @@ tests:
     sysbuild: true
     build_only: true
     extra_args:
-      - scan_SHIELD=nrf7002eb_interposer_p1 nrf7002eb
+      - scan_SHIELD="nrf7002eb_interposer_p1;nrf7002eb"
       - scan_SNIPPET=nrf70-wifi
     integration_platforms:
       - nrf54h20dk/nrf54h20/cpuapp

samples/wifi/shell/sample.yaml

@@ -207,7 +207,7 @@ tests:
     sysbuild: true
     build_only: true
     extra_args:
-      - shell_SHIELD=nrf7002eb_interposer_p1 nrf7002eb
+      - shell_SHIELD="nrf7002eb_interposer_p1;nrf7002eb"
       - shell_SNIPPET=nrf70-wifi
     integration_platforms:
       - nrf54h20dk/nrf54h20/cpuapp

samples/wifi/sta/sample.yaml

@@ -62,7 +62,7 @@ tests:
     sysbuild: true
     build_only: true
     extra_args:
-      - sta_SHIELD=nrf7002eb_interposer_p1 nrf7002eb
+      - sta_SHIELD="nrf7002eb_interposer_p1;nrf7002eb"
       - sta_SNIPPET=nrf70-wifi
     integration_platforms:
       - nrf54h20dk/nrf54h20/cpuapp