fastboot: remove 'default y' from RK_AVB_LIBAVB_ENABLE_ATH_UNLOCK

Open RK_AVB_LIBAVB_ENABLE_ATH_UNLOCK if need advanced security requirements.

Change-Id: Ie01c6342d379b672fe69e367262496d97b5890e9
Signed-off-by: Jason Zhu <[email protected]>

Author: Jason Zhu

cmd/fastboot/Kconfig

@@ -93,7 +93,6 @@ config FASTBOOT_OEM_UNLOCK
 config RK_AVB_LIBAVB_ENABLE_ATH_UNLOCK
 	bool "AVB Authenticated unlock function"
 	depends on ANDROID_AVB
-	default y
 	help
 	  Enabled authenticated unlock function can prevent lock state
 	  from invalid unlock cmd.