elf2flt: disable for blackfin

Now that we don't support the internal blackfin toolchain any more it
makes no sense to have this enabled.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/elf2flt/Config.in.host

@@ -1,6 +1,6 @@
 config BR2_PACKAGE_HOST_ELF2FLT
 	bool "Enable elf2flt support?"
-	depends on BR2_arm || BR2_bfin || BR2_sh || BR2_sparc
+	depends on BR2_arm || BR2_sh || BR2_sparc
 	depends on !BR2_USE_MMU
 	help
 	  uCLinux uses a Binary Flat format commonly known as BFLT. It