snippets: wifi-ipv4: Increase max polling sockets

When using this snippet with Zperf a boot warning is seen, fix the
warning by increasing the sockets.

Signed-off-by: Chaitanya Tata <Chaitanya.Tata@nordicsemi.no>

snippets/wifi-ipv4/wifi-ipv4.conf

@@ -7,7 +7,7 @@ CONFIG_WIFI_NM_WPA_SUPPLICANT=y
 CONFIG_MAIN_STACK_SIZE=2048
 CONFIG_ZVFS_OPEN_MAX=24
 CONFIG_NET_MAX_CONN=10
-CONFIG_NET_SOCKETS_POLL_MAX=9
+CONFIG_ZVFS_POLL_MAX=10
 
 # IPv4 only for now
 CONFIG_NET_IPV6=n