arch/bfin: always has atomic ops

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Anton Kolesov <Anton.Kolesov@synopsys.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

arch/Config.in.bfin

@@ -68,6 +68,9 @@ config BR2_ARCH
 config BR2_ENDIAN
 	default "LITTLE"
 
+config BR2_ARCH_HAS_ATOMICS
+	default y
+
 config BR2_GCC_TARGET_CPU
 	default bf606		if BR2_bf606
 	default bf607		if BR2_bf607