m68knommu: fix FEC platform device registration when driver is modular

The FEC (Fast Ethernet Crontroller) module on many ColdFire parts can
be compiled into the kernel, or as a module. Therefore the platform device
support for it is required whenever the driver is enabled - not just when
built into the kernel. Use IS_ENABLED(CONFIG_FEC) instead of a conditional
check on only the driver being built into the kernel.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>

arch/m68k/coldfire/device.c

@@ -89,7 +89,7 @@ static struct platform_device mcf_uart = {
 	.dev.platform_data	= mcf_uart_platform_data,
 };
 
-#ifdef CONFIG_FEC
+#if IS_ENABLED(CONFIG_FEC)
 
 #ifdef CONFIG_M5441x
 #define FEC_NAME	"enet-fec"
@@ -329,7 +329,7 @@ static struct platform_device mcf_qspi = {
 
 static struct platform_device *mcf_devices[] __initdata = {
 	&mcf_uart,
-#ifdef CONFIG_FEC
+#if IS_ENABLED(CONFIG_FEC)
 	&mcf_fec0,
 #ifdef MCFFEC_BASE1
 	&mcf_fec1,