toolchain/gcc: simplify BR2_GCC_SUPPORTS_* logic

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

toolchain/gcc/Config.in

@@ -72,12 +72,10 @@ config BR2_GCC_IS_SNAP
 
 config BR2_GCC_SUPPORTS_SYSROOT
 	bool
-	default n if BR2_GCC_VERSION_3_4_6 || BR2_GCC_VERSION_4_0_4 || BR2_GCC_VERSION_4_1_2
 	default y if !BR2_GCC_VERSION_3_4_6 && !BR2_GCC_VERSION_4_0_4 && !BR2_GCC_VERSION_4_1_2
 
 config BR2_GCC_SUPPORTS_FINEGRAINEDMTUNE
 	bool
-	default n if BR2_GCC_VERSION_3_4_6 || BR2_GCC_VERSION_4_0_4 || BR2_GCC_VERSION_4_1_2 || BR2_GCC_VERSION_4_2_1 || BR2_GCC_VERSION_4_2_2 || BR2_GCC_VERSION_4_2_3 || BR2_GCC_VERSION_4_2_4
 	default y if !BR2_GCC_VERSION_3_4_6 && !BR2_GCC_VERSION_4_0_4 && !BR2_GCC_VERSION_4_1_2 && !BR2_GCC_VERSION_4_2_1 && !BR2_GCC_VERSION_4_2_2 && !BR2_GCC_VERSION_4_2_3 && !BR2_GCC_VERSION_4_2_4
 
 config BR2_GCC_SNAP_DATE