Convert CONFIG_SYS_FMAN_V3 to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_FMAN_V3

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 5d90a92..21d6481 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -357,6 +357,9 @@
 config FMAN_ENET
 	bool "Freescale FMan ethernet support"
 	depends on ARM || PPC
+	select SYS_FMAN_V3 if ARCH_B4420 || ARCH_B4860 || ARCH_LS1043A || \
+		ARCH_LS1046A || ARCH_T1024 || ARCH_T1040 || ARCH_T1042 || \
+		ARCH_T2080 || ARCH_T4240
 	help
 	  This driver support the Freescale FMan Ethernet controller
 
@@ -370,6 +373,11 @@
 	depends on FMAN_ENET || QE || U_QE
 	default 0x10000
 
+config SYS_FMAN_V3
+	bool
+	help
+	  SoC has FMan v3 with mEMAC
+
 config FTMAC100
 	bool "Ftmac100 Ethernet Support"
 	help