Switch to BR2_TOOLCHAIN_HAS_SYNC_4 from BR2_sparc conditional since it's the correct one. Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar> Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>