soc/intel/alderlake: Add print that MRC training screen displayed

Add a INFO print indicating that we did infact attempt to display the
MRC training message to the user.

BUG=b:252792591
BRANCH=firmware-brya-14505.B
TEST=Print seen in cbmem -c

Signed-off-by: Tarun Tuli <taruntuli@google.com>
Change-Id: I1a20fb221aa2fa0eeaf9b7f8cf3d8a8ab0b91133
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71284
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-by: Jérémy Compostella <jeremy.compostella@intel.com>

src/soc/intel/alderlake/romstage/fsp_params.c

@@ -369,6 +369,7 @@ static void inform_user_of_memory_training(void)
 	    !early_graphics_init())
 		return;
 
+	printk(BIOS_INFO, "Informing user on-display of memory training.\n");
 	vga_write_text(VGA_TEXT_CENTER, VGA_TEXT_HORIZONTAL_MIDDLE,
 		       "Your device is finishing an update. This may take 1-2 minutes.\nPlease do not turn off your device.");
 }