efi: Add uclass for devices provided by UEFI firmware

UCLASS_EFI_LOADER is used for devices created by applications and
drivers loaded by U-Boots UEFI implementation.

This patch provides a new uclass (UCLASS_EFI_MEDIA) to be used for devices
that provided by a UEFI firmware calling U-Boot as an EFI application.

If the two uclasses can be unified, is left to future redesign.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h
index b68088d..0e26e1d 100644
--- a/include/dm/uclass-id.h
+++ b/include/dm/uclass-id.h
@@ -49,6 +49,7 @@
 	UCLASS_DSA,		/* Distributed (Ethernet) Switch Architecture */
 	UCLASS_ECDSA,		/* Elliptic curve cryptographic device */
 	UCLASS_EFI_LOADER,	/* Devices created by UEFI applications */
+	UCLASS_EFI_MEDIA,	/* Devices provided by UEFI firmware */
 	UCLASS_ETH,		/* Ethernet device */
 	UCLASS_ETH_PHY,		/* Ethernet PHY device */
 	UCLASS_FIRMWARE,	/* Firmware */