x86: early fault debugging improvement

Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

arch/x86/kernel/head_32.S

@@ -502,6 +502,7 @@ early_fault:
 	call printk
 #endif
 #endif
+	call dump_stack
 hlt_loop:
 	hlt
 	jmp hlt_loop