x86: Drop setup_pcat_compatibility()

This function does not exist anymore. Drop it from the header file.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/include/asm/u-boot-x86.h b/arch/x86/include/asm/u-boot-x86.h
index bd3f440..d732661 100644
--- a/arch/x86/include/asm/u-boot-x86.h
+++ b/arch/x86/include/asm/u-boot-x86.h
@@ -83,8 +83,6 @@
 /* Set up a UART which can be used with printch(), printhex8(), etc. */
 int setup_internal_uart(int enable);
 
-void setup_pcat_compatibility(void);
-
 void isa_unmap_rom(u32 addr);
 u32 isa_map_rom(u32 bus_addr, int size);
 
diff --git a/arch/x86/lib/zimage.c b/arch/x86/lib/zimage.c
index 64d14e8..d2b6002 100644
--- a/arch/x86/lib/zimage.c
+++ b/arch/x86/lib/zimage.c
@@ -304,13 +304,6 @@
 	return 0;
 }
 
-void setup_pcat_compatibility(void)
-	__attribute__((weak, alias("__setup_pcat_compatibility")));
-
-void __setup_pcat_compatibility(void)
-{
-}
-
 int do_zboot(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
 	struct boot_params *base_ptr;
@@ -323,9 +316,6 @@
 
 	disable_interrupts();
 
-	/* Setup board for maximum PC/AT Compatibility */
-	setup_pcat_compatibility();
-
 	if (argc >= 2) {
 		/* argv[1] holds the address of the bzImage */
 		s = argv[1];