Correct SPL use of NETDEVICES

This converts 1 usage of this option to the non-SPL form, since there is
no SPL_NETDEVICES defined in Kconfig

Signed-off-by: Simon Glass <[email protected]>

Author: sjg20

net/bootp.c

@@ -1078,7 +1078,7 @@ static void dhcp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
 #endif	/* CONFIG_SYS_BOOTFILE_PREFIX */
 			dhcp_packet_process_options(bp);
 			if (CONFIG_IS_ENABLED(EFI_LOADER) &&
-			    CONFIG_IS_ENABLED(NETDEVICES))
+			    IS_ENABLED(CONFIG_NETDEVICES))
 				efi_net_set_dhcp_ack(pkt, len);
 
 #if defined(CONFIG_SERVERIP_FROM_PROXYDHCP)