net: sfp: remove acpi.h include

Nothing in the sfp code now references anything from the ACPI header,
everything is done via fwnode APIs, so get rid of this header.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/phy/sfp.c

 // SPDX-License-Identifier: GPL-2.0
-#include <linux/acpi.h>
 #include <linux/ctype.h>
 #include <linux/debugfs.h>
 #include <linux/delay.h>