x86: Show the timestamp counter with bdinfo

Add a line to the 'bdinfo' command which shows the current value of the
TSC.

Signed-off-by: Simon Glass <sjg@chromium.org>

arch/x86/lib/bdinfo.c

@@ -33,6 +33,8 @@ void arch_print_bdinfo(void)
 	bdinfo_print_num_l(" high start", gd->arch.table_start_high);
 	bdinfo_print_num_l(" high end", gd->arch.table_end_high);
 
+	bdinfo_print_num_ll("tsc", rdtsc());
+
 	if (IS_ENABLED(CONFIG_EFI_STUB))
 		efi_show_bdinfo();
 }