common: Move older CPU functions to their own header

These should be moved to driver model, but in the meantime, move them
out of the common header to help reduce its size.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

include/common.h

@@ -355,14 +355,6 @@ static inline struct in_addr env_get_ip(char *var)
 void show_activity(int arg);
 #endif
 
-/* Multicore arch functions */
-#ifdef CONFIG_MP
-int cpu_status(u32 nr);
-int cpu_reset(u32 nr);
-int cpu_disable(u32 nr);
-int cpu_release(u32 nr, int argc, char * const argv[]);
-#endif
-
 #else	/* __ASSEMBLY__ */
 
 #endif	/* __ASSEMBLY__ */