cpu: Move cpu_write_elfXX_note() functions to CPUState

Convert cpu_write_elfXX_note() functions to CPUClass methods and pass
CPUState as argument. Update target-i386 accordingly.

Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
[AF: Retain stubs as CPUClass' default method implementation; style changes]
Signed-off-by: Andreas Färber <afaerber@suse.de>
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 0d9493d..40d51be 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -2351,6 +2351,12 @@
     cc->reset = x86_cpu_reset;
 
     cc->do_interrupt = x86_cpu_do_interrupt;
+#ifndef CONFIG_USER_ONLY
+    cc->write_elf64_note = x86_cpu_write_elf64_note;
+    cc->write_elf64_qemunote = x86_cpu_write_elf64_qemunote;
+    cc->write_elf32_note = x86_cpu_write_elf32_note;
+    cc->write_elf32_qemunote = x86_cpu_write_elf32_qemunote;
+#endif
     cpu_class_set_vmsd(cc, &vmstate_x86_cpu);
 
     cc->get_arch_id = x86_cpu_get_arch_id;