Compile qemu-timer only once

Arrange various declarations so that also non-CPU code can access
them, adjust users.

Move CPU specific code to cpus.c.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

exec-all.h

@@ -337,20 +337,6 @@ static inline tb_page_addr_t get_page_addr_code(CPUState *env1, target_ulong add
         + env1->tlb_table[mmu_idx][page_index].addend;
     return qemu_ram_addr_from_host(p);
 }
-
-/* Deterministic execution requires that IO only be performed on the last
-   instruction of a TB so that interrupts take effect immediately.  */
-static inline int can_do_io(CPUState *env)
-{
-    if (!use_icount)
-        return 1;
-
-    /* If not executing code then assume we are ok.  */
-    if (!env->current_tb)
-        return 1;
-
-    return env->can_do_io != 0;
-}
 #endif
 
 typedef void (CPUDebugExcpHandler)(CPUState *env);