net: mscc: ocelot: fix duplicate driver name error

When compiling a kernel which has both CONFIG_NET_DSA_MSCC_OCELOT_EXT
and CONFIG_MSCC_OCELOT_SWITCH enabled, the following error message will
be printed:

[    5.266588] Error: Driver 'ocelot-switch' is already registered, aborting...

Rename the ocelot_ext.c driver to "ocelot-ext-switch" to avoid the name
duplication, and update the mfd_cell entry for its resources.

Fixes: 3d7316ac ("net: dsa: ocelot: add external ocelot switch control")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/mfd/ocelot-core.c

@@ -177,7 +177,7 @@ static const struct mfd_cell vsc7512_devs[] = {
 		.num_resources = ARRAY_SIZE(vsc7512_miim1_resources),
 		.resources = vsc7512_miim1_resources,
 	}, {
-		.name = "ocelot-switch",
+		.name = "ocelot-ext-switch",
 		.of_compatible = "mscc,vsc7512-switch",
 		.num_resources = ARRAY_SIZE(vsc7512_switch_resources),
 		.resources = vsc7512_switch_resources,

drivers/net/dsa/ocelot/ocelot_ext.c

@@ -149,7 +149,7 @@ MODULE_DEVICE_TABLE(of, ocelot_ext_switch_of_match);
 
 static struct platform_driver ocelot_ext_switch_driver = {
 	.driver = {
-		.name = "ocelot-switch",
+		.name = "ocelot-ext-switch",
 		.of_match_table = of_match_ptr(ocelot_ext_switch_of_match),
 	},
 	.probe = ocelot_ext_probe,