toolchain: m68k coldfire is also affected by gcc bug 64735

Verified experimentally by using exception_ptr with m68k_cf5208 and
looking at the value of ATOMIC_INT_LOCK_FREE. ATOMIC_INT_LOCK_FREE=1,
so the issue is present. Also verified that gcc 7.x fixed it also for
cf5208.

Signed-off-by: Jan Heylen <jan.heylen@nokia.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
(cherry picked from commit 98b3b83fb54323cd1be0f38084a51c4e0c939e65)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

toolchain/toolchain-common.in

@@ -22,6 +22,7 @@ config BR2_TOOLCHAIN_HAS_GCC_BUG_64735
 	default y if BR2_ARM_CPU_ARMV4
 	default y if BR2_ARM_CPU_ARMV5
 	default y if BR2_sparc_v8
+	default y if BR2_m68k_cf5208
 	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_7
 
 config BR2_TOOLCHAIN_HAS_NATIVE_RPC