xtensa: add NOTES section to the linker script

This section collects all source .note.* sections together in the
vmlinux image. Without it .note.Linux section may be placed at address
0, while the rest of the kernel is at its normal address, resulting in a
huge vmlinux.bin image that may not be linked into the xtensa Image.elf.

Cc: [e-mail]
Signed-off-by: Max Filippov <[e-mail]>

arch/xtensa/boot/Makefile

···
 boot-elf boot-redboot: $(addprefix $(obj)/,$(subdir-y))
 	$(Q)$(MAKE) $(build)=$(obj)/$@ $(MAKECMDGOALS)
 
-OBJCOPYFLAGS = --strip-all -R .comment -R .note.gnu.build-id -O binary
+OBJCOPYFLAGS = --strip-all -R .comment -R .notes -O binary
 
 vmlinux.bin: vmlinux FORCE
 	$(call if_changed,objcopy)

arch/xtensa/kernel/vmlinux.lds.S

···
   .fixup   : { *(.fixup) }
 
   EXCEPTION_TABLE(16)
+  NOTES
   /* Data section */
 
   _sdata = .;