Backport an upstream patch fixing the build with binutils >= 2.38
for riscv's for Zicsr and Zifencei.
Fixes:
https://gitlab.com/buildroot.org/buildroot/-/jobs/4987456149
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>