memory: don't pass ->readable attribute to cpu_register_physical_memory_log

It can be derived from the MemoryRegion itself (which is why it is not
used there).

Signed-off-by: Avi Kivity <avi@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
diff --git a/exec-obsolete.h b/exec-obsolete.h
index 94c23d0..23ffbaa 100644
--- a/exec-obsolete.h
+++ b/exec-obsolete.h
@@ -37,7 +37,7 @@
 
 struct MemoryRegionSection;
 void cpu_register_physical_memory_log(struct MemoryRegionSection *section,
-                                      bool readable, bool readonly);
+                                      bool readonly);
 
 void qemu_register_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size);
 void qemu_unregister_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size);