cmdline: move cmdline to x86

Now risc-v doesn't support cmdline

Tracked-On: #8805
Signed-off-by: Fei Li <fei1.li@intel.com>

hypervisor/include/debug/console.h

@@ -41,7 +41,6 @@ void console_vmexit_callback(struct acrn_vcpu *vcpu);
 void suspend_console(void);
 void resume_console(void);
 struct acrn_vuart *vm_console_vuart(struct acrn_vm *vm);
-bool is_using_init_ipi(void);
 
 bool console_need_log(uint32_t severity);
 void console_log(char *buffer);