soc/intel/alderlake: Display low battery message on screen

This commit adds a function ux_inform_user_of_poweroff_operation
to display a message on the screen when the system is powering off due
to critically low battery. The message is centered on the screen and
displays a localized string "Battery critically low. Shutting down.".
If no localized string is found, a default English message is displayed.

This implementation relies on CHROMEOS_ENABLE_ESOL Kconfig which is used
to render text message for early sign-of-life.

BUG=b:339673254
TEST=Able to capture the eventlog for low battery boot event.

Change-Id: I3b24d2c89ade8cc62b7e47c487d52d47b7f3376d
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86224
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Jérémy Compostella <jeremy.compostella@intel.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Dinesh Gehlot <digehlot@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

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

@@ -32,3 +32,8 @@ bool ux_inform_user_of_update_operation(const char *name)
 {
 	return ux_inform_user_of_operation(name, UX_LOCALE_MSG_MEMORY_TRAINING);
 }
+
+bool ux_inform_user_of_poweroff_operation(const char *name)
+{
+	return ux_inform_user_of_operation(name, UX_LOCALE_MSG_LOW_BATTERY);
+}

src/soc/intel/alderlake/romstage/ux.h

@@ -4,5 +4,6 @@
 #define _SOC_INTEL_ALDERLAKE_ROMSTAGE_UX_H_
 
 bool ux_inform_user_of_update_operation(const char *name);
+bool ux_inform_user_of_poweroff_operation(const char *name);
 
 #endif /* _SOC_INTEL_ALDERLAKE_ROMSTAGE_UX_H_ */