x86: Move setup_pcat_compatibility() out of board.c

This function simply does not belong in board.c

--
Changes for v2:
 - Added commit message

arch/x86/lib/board.c

@@ -486,10 +486,3 @@ void hang(void)
 	for (;;)
 		;
 }
-
-void setup_pcat_compatibility(void)
-	__attribute__((weak, alias("__setup_pcat_compatibility")));
-
-void __setup_pcat_compatibility(void)
-{
-}

arch/x86/lib/zimage.c

@@ -314,6 +314,13 @@ void boot_zimage(void *setup_base, void *load_address)
 #endif
 }
 
+void setup_pcat_compatibility(void)
+	__attribute__((weak, alias("__setup_pcat_compatibility")));
+
+void __setup_pcat_compatibility(void)
+{
+}
+
 int do_zboot(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
 {
 	struct boot_params *base_ptr;