x86: Drop setup_pcat_compatibility()

This function does not exist anymore. Drop it from the header file.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>

arch/x86/include/asm/u-boot-x86.h

@@ -83,8 +83,6 @@ int default_print_cpuinfo(void);
 /* 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);
 

arch/x86/lib/zimage.c

@@ -304,13 +304,6 @@ int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot,
 	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 @@ int do_zboot(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 
 	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];