crash: export paddr_vmcoreinfo_note()

The following patch is going to use the symbol from the fw_cfg module,
to call the function and write the note location details in the
vmcoreinfo entry, so qemu can produce dumps with the vmcoreinfo note.

CC: Andrew Morton <[email protected]>
CC: Hari Bathini <[email protected]>
CC: Tony Luck <[email protected]>
CC: Vivek Goyal <[email protected]>
Acked-by: Baoquan He <[email protected]>
Acked-by: Dave Young <[email protected]>
Signed-off-by: Marc-André Lureau <[email protected]>
Acked-by: Gabriel Somlo <[email protected]>
Signed-off-by: Michael S. Tsirkin <[email protected]>

kernel/crash_core.c

@@ -376,6 +376,7 @@ phys_addr_t __weak paddr_vmcoreinfo_note(void)
 {
 	return __pa(vmcoreinfo_note);
 }
+EXPORT_SYMBOL(paddr_vmcoreinfo_note);
 
 static int __init crash_save_vmcoreinfo_init(void)
 {