src/drivers: Remove needless '&' on function pointers

Change-Id: I7a99d0dcbc8ea1362a12a68fa519c49058d30a05
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/29868
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/src/drivers/usb/acpi/usb_acpi.c b/src/drivers/usb/acpi/usb_acpi.c
index abc1718..8c63d2a 100644
--- a/src/drivers/usb/acpi/usb_acpi.c
+++ b/src/drivers/usb/acpi/usb_acpi.c
@@ -86,8 +86,8 @@
 	.read_resources			= DEVICE_NOOP,
 	.set_resources			= DEVICE_NOOP,
 	.enable_resources		= DEVICE_NOOP,
-	.scan_bus			= &scan_usb_bus,
-	.acpi_fill_ssdt_generator	= &usb_acpi_fill_ssdt_generator,
+	.scan_bus			= scan_usb_bus,
+	.acpi_fill_ssdt_generator	= usb_acpi_fill_ssdt_generator,
 };
 
 static void usb_acpi_enable(struct device *dev)
@@ -97,5 +97,5 @@
 
 struct chip_operations drivers_usb_acpi_ops = {
 	CHIP_NAME("USB ACPI Device")
-	.enable_dev = &usb_acpi_enable
+	.enable_dev = usb_acpi_enable
 };