Convert CONFIG_SYS_CFI_FLASH_STATUS_POLL to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_CFI_FLASH_STATUS_POLL

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig
index c3f5455..d0ab7c1 100644
--- a/drivers/mtd/Kconfig
+++ b/drivers/mtd/Kconfig
@@ -96,6 +96,10 @@
 	  Enable this option to allow for the flash_{read,write}{8,16,32,64}
 	  functions to be overridden by the platform.
 
+config SYS_CFI_FLASH_STATUS_POLL
+	bool "Poll status on AMD flash chips"
+	depends on FLASH_CFI_DRIVER
+
 config SYS_FLASH_USE_BUFFER_WRITE
 	bool "Enable buffered writes to flash"
 	depends on FLASH_CFI_DRIVER