toolchain: disable gcc bug 60620 if gcc version >= 10.x

Since gcc version 10.x bug 60620 doesn't show anymore, so let's make it
enabled up to versino 10.x excluded.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

toolchain/Config.in

@@ -154,10 +154,11 @@ config BR2_TOOLCHAIN_HAS_GCC_BUG_85862
 
 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90620
 # ICE: in do_output_reload, at reload1.c:7978 on microblaze.
-# It's still not fixed in gcc 9.x
+# This bug no longer exists in gcc 10.x
 config BR2_TOOLCHAIN_HAS_GCC_BUG_90620
 	bool
 	default y if BR2_microblaze
+	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_10
 
 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93847
 # ICE: compiler error: Segmentation fault on Nios II. This bug