toolchain-common.in: Fix USE_MMU typo

Thanks to Marc Gauthier for noticing.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

toolchain/toolchain-common.in

@@ -67,7 +67,7 @@ config BR2_NEEDS_GETTEXT_IF_LOCALE
 	default y if (BR2_NEEDS_GETTEXT && BR2_ENABLE_LOCALE)
 
 config BR2_USE_MMU
-	bool "Enable MMU support" if BR2_arm || BR2_armeb || BR2_mips || BR2_mipsel || BR2_sh || BR2_extensa
+	bool "Enable MMU support" if BR2_arm || BR2_armeb || BR2_mips || BR2_mipsel || BR2_sh || BR2_xtensa
 	default y
 	help
 	  If your target has a MMU, you should say Y here.  If you