use default binutils for sh architecture

Tested toolchain compiles with binutils 2.22 and 2.24.
Result tested in Qemu 2.0.0. (only little endian version
tested)

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/binutils/Config.in.host

@@ -3,7 +3,6 @@ comment "Binutils Options"
 choice
 	prompt "Binutils Version"
 	depends on !BR2_arc
-	default BR2_BINUTILS_VERSION_2_21 if BR2_sh
 	default BR2_BINUTILS_VERSION_2_24 if BR2_microblaze || BR2_powerpc64le
 	default BR2_BINUTILS_VERSION_2_22
 	help