x86: Make default_print_cpuinfo be a weak alias for print_cpuinfo

While a few SoCs have a unique print_cpuinfo function, a number of them
just use default_print_cpuinfo. Make default_print_cpuinfo have a weak
alias to provie print_cpuinfo.

Signed-off-by: Tom Rini <trini@konsulko.com>

arch/x86/cpu/slimbootloader/slimbootloader.c

@@ -54,8 +54,3 @@ int checkcpu(void)
 {
 	return 0;
 }
-
-int print_cpuinfo(void)
-{
-	return default_print_cpuinfo();
-}