accel/tcg: Merge tcg_exec_init into tcg_init_machine

There is only one caller, and shortly we will need access
to the MachineState, which tcg_init_machine already has.

Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

bsd-user/main.c

@@ -813,7 +813,7 @@ int main(int argc, char **argv)
     envlist_free(envlist);
 
     /*
-     * Now that page sizes are configured in tcg_exec_init() we can do
+     * Now that page sizes are configured we can do
      * proper page alignment for guest_base.
      */
     guest_base = HOST_PAGE_ALIGN(guest_base);