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/uniphier_v8_defconfig b/configs/uniphier_v8_defconfig
index 5ec3912..2558755 100644
--- a/configs/uniphier_v8_defconfig
+++ b/configs/uniphier_v8_defconfig
@@ -34,6 +34,8 @@
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_SDMA=y
 CONFIG_MMC_SDHCI_CADENCE=y
+CONFIG_FLASH_CFI_DRIVER=y
+CONFIG_SYS_FLASH_CFI=y
 CONFIG_NAND=y
 CONFIG_NAND_DENALI_DT=y
 CONFIG_NAND_DENALI_SPARE_AREA_SKIP_BYTES=8