[NET] Kconfig: Rename MIKROTIK_RB500 -> MIKROTIK_RB532

The platform is actually named routerboard 532 so let's call it this.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 8082c1d..f90a86b 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -469,7 +469,7 @@
 
 config KORINA
 	tristate "Korina (IDT RC32434) Ethernet support"
-	depends on NET_ETHERNET && MIKROTIK_RB500
+	depends on NET_ETHERNET && MIKROTIK_RB532
 	help
 	  If you have a Mikrotik RouterBoard 500 or IDT RC32434
 	  based system say Y. Otherwise say N.