arch/bfin: needs gcc >= 6

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

arch/Config.in

@@ -79,6 +79,7 @@ config BR2_aarch64_be
 config BR2_bfin
 	bool "Blackfin"
 	select BR2_ARCH_HAS_FDPIC_SUPPORT
+	select BR2_ARCH_NEEDS_GCC_AT_LEAST_6
 	help
 	  The Blackfin is a family of 16 or 32-bit microprocessors developed,
 	  manufactured and marketed by Analog Devices.

package/gcc/Config.in.host

@@ -24,7 +24,7 @@ config BR2_GCC_VERSION_4_9_X
 	bool "gcc 4.9.x"
 	depends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_5
 	# Broken or unsupported architectures
-	depends on !BR2_arc && !BR2_bfin && !BR2_or1k
+	depends on !BR2_arc && !BR2_or1k
 	# Broken or unsupported ARM cores
 	depends on !BR2_cortex_a17 && !BR2_cortex_a17_a7
 	depends on !BR2_cortex_a72 && !BR2_cortex_a72_a53
@@ -48,7 +48,7 @@ config BR2_GCC_VERSION_5_X
 	bool "gcc 5.x"
 	depends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_6
 	# Broken or unsupported architectures
-	depends on !BR2_arc && !BR2_bfin && !BR2_or1k
+	depends on !BR2_arc && !BR2_or1k
 	# Broken or unsupported ARM cores
 	depends on !BR2_cortex_a57_a53 && !BR2_cortex_a72_a53
 	# musl ppc64 unsupported