util/crossgcc: Update gcc to 11.2

Various fixes to gnat and the improved nds32 backend have been merged
into gcc by now, so we don't need to carry those patches anymore.

Change-Id: Icdee2a8beedd109ee1f0eef6f32f7accbf66674b
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/54050
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

util/crossgcc/buildgcc

@@ -35,7 +35,7 @@ THREADS=1
 GMP_VERSION=6.2.1
 MPFR_VERSION=4.1.0
 MPC_VERSION=1.2.1
-GCC_VERSION=8.3.0
+GCC_VERSION=11.2.0
 GCC_AUTOCONF_VERSION=2.69
 BINUTILS_VERSION=2.37
 GDB_VERSION=9.2