nb/intel/x4x: Report if running in async mode

Change-Id: I84d5457173598e8ff41dfb048a6858b41c5692ac
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49397
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/northbridge/intel/x4x/raminit_ddr23.c

@@ -895,6 +895,7 @@ static void program_dll(struct sysinfo *s)
 	if (j < 2) {
 		MCHBAR8_AND(0x1c8, ~0x1f);
 		async = 1;
+		printk(BIOS_NOTICE, "HMC failed, using async mode\n");
 	}
 
 	switch (s->selected_timings.mem_clk) {