Convert CONFIG_FLASH_CFI_DRIVER et al to Kconfig

This converts the following to Kconfig:
   CONFIG_FLASH_CFI_DRIVER
   CONFIG_SYS_FLASH_USE_BUFFER_WRITE
   CONFIG_FLASH_CFI_MTD
   CONFIG_SYS_FLASH_PROTECTION
   CONFIG_SYS_FLASH_CFI

Signed-off-by: Adam Ford <aford173@gmail.com>
[trini: Re-migrate]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/huawei_hg556a_ram_defconfig b/configs/huawei_hg556a_ram_defconfig
index 039dc2f..6bb14ba 100644
--- a/configs/huawei_hg556a_ram_defconfig
+++ b/configs/huawei_hg556a_ram_defconfig
@@ -36,7 +36,10 @@
 CONFIG_LED_GPIO=y
 CONFIG_MTD=y
 CONFIG_MTD_NOR_FLASH=y
+CONFIG_FLASH_CFI_DRIVER=y
 CONFIG_CFI_FLASH=y
+CONFIG_SYS_FLASH_PROTECTION=y
+CONFIG_SYS_FLASH_CFI=y
 CONFIG_PHY=y
 CONFIG_BCM6358_USBH_PHY=y
 CONFIG_DM_RESET=y