Convert CONFIG_DRIVER_TI_EMAC_USE_RMII to Kconfig

This converts the following to Kconfig:
   CONFIG_DRIVER_TI_EMAC_USE_RMII
Signed-off-by: NAdam Ford <aford173@gmail.com>

configs/am3517_evm_defconfig

@@ -63,6 +63,7 @@ CONFIG_SYS_NAND_U_BOOT_OFFS=0x80000
 CONFIG_DM_ETH=y
 CONFIG_MII=y
 CONFIG_DRIVER_TI_EMAC=y
+CONFIG_DRIVER_TI_EMAC_USE_RMII=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_SINGLE=y
 CONFIG_DM_PMIC=y

drivers/net/ti/Kconfig

@@ -14,6 +14,12 @@ config DRIVER_TI_EMAC
 	help
 	   Support for davinci emac
 
+config DRIVER_TI_EMAC_USE_RMII
+	depends on DRIVER_TI_EMAC
+	bool "Use RMII"
+	help
+	  Configure the TI EMAC driver to use RMII
+
 config DRIVER_TI_KEYSTONE_NET
 	bool "TI Keystone 2 Ethernet"
 	help

include/configs/am3517_evm.h

@@ -32,7 +32,6 @@
 /* I2C */
 
 /* Ethernet */
-#define CONFIG_DRIVER_TI_EMAC_USE_RMII
 #define CONFIG_BOOTP_DEFAULT
 #define CONFIG_BOOTP_SEND_HOSTNAME
 #define CONFIG_NET_RETRY_COUNT		10

include/configs/omapl138_lcdk.h

@@ -152,7 +152,6 @@
  * Network & Ethernet Configuration
  */
 #ifdef CONFIG_DRIVER_TI_EMAC
-#undef	CONFIG_DRIVER_TI_EMAC_USE_RMII
 #define CONFIG_BOOTP_DEFAULT
 #define CONFIG_BOOTP_SEND_HOSTNAME
 #define CONFIG_NET_RETRY_COUNT	10

include/configs/tam3517-common.h

@@ -117,7 +117,6 @@
  * ethernet support, EMAC
  *
  */
-#define CONFIG_DRIVER_TI_EMAC_USE_RMII
 #define CONFIG_BOOTP_SEND_HOSTNAME
 #define CONFIG_NET_RETRY_COUNT 10
 

scripts/config_whitelist.txt

@@ -331,7 +331,6 @@ CONFIG_DRIVER_DM9000
 CONFIG_DRIVER_EP93XX_MAC
 CONFIG_DRIVER_NE2000
 CONFIG_DRIVER_NE2000_BASE
-CONFIG_DRIVER_TI_EMAC_USE_RMII
 CONFIG_DSP_CLUSTER_START
 CONFIG_DWC2_DFLT_SPEED_FULL
 CONFIG_DWC2_DMA_BURST_SIZE