toolchain/toolchain-external/toolchain-external-bootlin: regenerate after mips64 toolchain removal

Fixes:

  http://autobuild.buildroot.net/results/d13b35ba5a0f68f72e6592bdd9218b625a3c6554/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

toolchain/toolchain-external/toolchain-external-bootlin/Config.in.options

@@ -18,7 +18,6 @@ config BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_ARCH_SUPPORTS
 	default y if BR2_mipsel && BR2_mips_32 && !BR2_MIPS_SOFT_FLOAT
 	default y if BR2_mipsel && BR2_mips_32r5 && !BR2_MIPS_SOFT_FLOAT
 	default y if BR2_mipsel && BR2_mips_32r6 && !BR2_MIPS_SOFT_FLOAT
-	default y if BR2_mips64 && BR2_mips_64 && !BR2_MIPS_SOFT_FLOAT
 	default y if BR2_mips64 && BR2_mips_64 && BR2_MIPS_NABI32 && !BR2_MIPS_SOFT_FLOAT
 	default y if BR2_mips64el && BR2_mips_64 && BR2_MIPS_NABI32 && !BR2_MIPS_SOFT_FLOAT
 	default y if BR2_mips64el && BR2_mips_64r6 && BR2_MIPS_NABI32 && !BR2_MIPS_SOFT_FLOAT