x86: Drop unnecessary interrupt code for TPL

We don't expect an exception in TPL and don't need to set up interrupts in
TPL. Drop this whole file.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

arch/x86/cpu/i386/Makefile

@@ -5,5 +5,7 @@
 
 obj-y += call64.o
 obj-y += cpu.o
+ifndef CONFIG_TPL_BUILD
 obj-y += interrupt.o
+endif
 obj-y += setjmp.o