[nrf fromlist] net: l2: wifi: Increase maximum argc count

Increase the shell's maximum argc count to handle both
mandatory and optional arguments in the Wi-Fi commands.

Upstream PR #: 86974

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

Author: D-Triveni

subsys/net/l2/wifi/Kconfig

@@ -125,3 +125,7 @@ config WIFI_ENT_IDENTITY_MAX_USERS
 	default 8
 	help
 	  This option defines the maximum number of identity users allowed connection.
+
+config SHELL_ARGC_MAX
+	int
+	default 30