x86: disable CONFIG_EFI_VARS
Disable CONFIG_EFI_VARS, since it suffers from sysfs limitation (no
support for variable longer than 1024 bytes).
kmod-fs-efivarfs is the replacement of this, which enables mounting
efivarfs file system and doesn't suffer from 1024 bytes limitation.
Signed-off-by: Alif M. Ahmad <[email protected]>