riscv: Link with '-z norelro'

This patch fixes a stable only patch, so it has no direct upstream
equivalent.

After a stable only patch to explicitly handle the '.got' section to
handle an orphan section warning from the linker, certain configurations
error when linking with ld.lld, which enables relro by default:

  ld.lld: error: section: .got is not contiguous with other relro sections

This has come up with other architectures before, such as arm and arm64
in commit 0cda9bc15d ("ARM: 9038/1: Link with '-z norelro'") and
commit 3b92fa7485 ("arm64: link with -z norelro regardless of
CONFIG_RELOCATABLE"). Additionally, '-z norelro' is used unconditionally
for RISC-V upstream after commit 26e7aacb83 ("riscv: Allow to
downgrade paging mode from the command line"), which alluded to this
issue for the same reason. Bring 6.3 in line with mainline and link with
'-z norelro', which resolves the above link failure.

Fixes: e6d1562dd4 ("riscv: vmlinux.lds.S: Explicitly handle '.got' section")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202306192231.DJmWr6BX-lkp@intel.com/
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/riscv/Makefile

@@ -7,7 +7,7 @@
 #
 
 OBJCOPYFLAGS    := -O binary
-LDFLAGS_vmlinux :=
+LDFLAGS_vmlinux := -z norelro
 ifeq ($(CONFIG_DYNAMIC_FTRACE),y)
 	LDFLAGS_vmlinux := --no-relax
 	KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY