Convert CONFIG_SYS_FLASH_QUIET_TEST to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_FLASH_QUIET_TEST

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/ls2080ardb_nand_defconfig b/configs/ls2080ardb_nand_defconfig
index 8ec4e6a..189a4e0 100644
--- a/configs/ls2080ardb_nand_defconfig
+++ b/configs/ls2080ardb_nand_defconfig
@@ -92,6 +92,7 @@
 CONFIG_SYS_FLASH_USE_BUFFER_WRITE=y
 CONFIG_SYS_FLASH_EMPTY_INFO=y
 CONFIG_SYS_FLASH_CFI=y
+CONFIG_SYS_FLASH_QUIET_TEST=y
 CONFIG_SYS_MAX_FLASH_SECT=1024
 CONFIG_NAND_FSL_IFC=y
 CONFIG_SYS_NAND_ONFI_DETECTION=y