Revert "board_f: Use static print_cpuinfo if CONFIG_CPU is active"

This reverts commit c0434407b5.

It turns out commit c0434407b5 broke some boards which have DM CPU
driver with CONFIG_DISPLAY_CPUINFO option on. These boards just fail
to boot when print_cpuinfo() is called during boot.

Fixes are already sent to ML and in u-boot-dm/next, however since
we are getting close to the v2018.11 release, it's safer we revert
the original commit.

This commit should be reverted after v2018.11 release.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

include/init.h

@@ -109,14 +109,7 @@ int arch_reserve_stacks(void);
  */
 int init_cache_f_r(void);
 
-#if !CONFIG_IS_ENABLED(CPU)
-/**
- * print_cpuinfo() - Display information about the CPU
- *
- * Return: 0 if OK, -ve on error
- */
 int print_cpuinfo(void);
-#endif
 int timer_init(void);
 int reserve_mmu(void);
 int misc_init_f(void);