opaque_master: Use new API to register shutdown function

This allows opaque masters to register shutdown function in
opaque_master struct, which means there is no need to call
register_shutdown in init function, since this call is now a part
of register_opaque_master.

As a consequence of using new API, two things are happening here:
1) No resource leakage anymore in case register_shutdown() would fail,
2) Fixed propagation of register_opaque_master() return values.

Tested: 1) builds and ninja test including CB:56413
2) on ARMv7 device
flashrom -p linux_mtd -V
-> using linux_mtd, chip found

Change-Id: Id8471a117556edcbf9694752fabe05cf4501ce70
Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/56825
Original-Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/72230
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/nicintel_eeprom.c b/nicintel_eeprom.c
index 6c18848..a8b9333 100644
--- a/nicintel_eeprom.c
+++ b/nicintel_eeprom.c
@@ -395,18 +395,24 @@
 	return nicintel_ee_write_82580(flash, NULL, addr, len);
 }
 
+static int nicintel_ee_shutdown_82580(void *eecp);
+
 static const struct opaque_master opaque_master_nicintel_ee_82580 = {
 	.probe		= nicintel_ee_probe_82580,
 	.read		= nicintel_ee_read,
 	.write		= nicintel_ee_write_82580,
 	.erase		= nicintel_ee_erase_82580,
+	.shutdown	= nicintel_ee_shutdown_82580,
 };
 
+static int nicintel_ee_shutdown_i210(void *arg);
+
 static const struct opaque_master opaque_master_nicintel_ee_i210 = {
 	.probe		= nicintel_ee_probe_i210,
 	.read		= nicintel_ee_read,
 	.write		= nicintel_ee_write_i210,
 	.erase		= nicintel_ee_erase_i210,
+	.shutdown	= nicintel_ee_shutdown_i210,
 };
 
 static int nicintel_ee_shutdown_i210(void *arg)
@@ -497,19 +503,13 @@
 			*eecp = eec;
 		}
 
-		if (register_shutdown(nicintel_ee_shutdown_82580, eecp))
-			return 1;
-
-		return register_opaque_master(&opaque_master_nicintel_ee_82580, NULL);
+		return register_opaque_master(&opaque_master_nicintel_ee_82580, eecp);
 	} else {
 		nicintel_eebar = rphysmap("Intel i210 NIC w/ emulated EEPROM",
 					  io_base_addr + 0x12000, MEMMAP_SIZE);
 		if (!nicintel_eebar)
 			return 1;
 
-		if (register_shutdown(nicintel_ee_shutdown_i210, NULL))
-			return 1;
-
 		return register_opaque_master(&opaque_master_nicintel_ee_i210, NULL);
 	}