HV: refine cmdline code, move parts into dbg_cmd

move the debug related command handle into debug/dbg_cmd.c;
so release build will not include that.

Tracked-On: #2170
Signed-off-by: Minggui Cao <minggui.cao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

hypervisor/include/debug/console.h

@@ -46,4 +46,5 @@ void shell_kick(void);
 void suspend_console(void);
 void resume_console(void);
 
+bool handle_dbg_cmd(const char *cmd, int32_t len);
 #endif /* CONSOLE_H */