arch/m68k: 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.m68k

@@ -4,6 +4,9 @@ config BR2_ARCH
 config BR2_ENDIAN
 	default "BIG"
 
+config BR2_ARCH_HAS_ATOMICS
+	default y
+
 config BR2_GCC_TARGET_TUNE
 	default "68000"		if BR2_m68k_68000
 	default "68010"		if BR2_m68k_68010