efi: Create ECPT table

The ECPT table will be included in the UEFI specification 2.9+.
The ECPT table was introduced in UEFI following the code-first path. The
acceptance ticket can be viewed at:
	https://bugzilla.tianocore.org/show_bug.cgi?id=3591

The Conformance Profiles table is a UEFI configuration table that contains
GUID of the UEFI profiles that the UEFI implementation conforms with.

The ECPT table is created when CONFIG_EFI_ECPT=y.
The config is set by default.

Signed-off-by: Jose Marinho <jose.marinho@arm.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/include/efi_loader.h b/include/efi_loader.h
index 9611aec..545ba06 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -1053,6 +1053,13 @@
 efi_status_t efi_esrt_register(void);
 
 /**
+ * efi_ecpt_register() - Install the ECPT system table.
+ *
+ * Return: status code
+ */
+efi_status_t efi_ecpt_register(void);
+
+/**
  * efi_esrt_populate() - Populates the ESRT entries from the FMP instances
  * present in the system.
  * If an ESRT already exists, the old ESRT is replaced in the system table.