ionic: use int type for err in ionic_get_module_eeprom_by_page

JIRA: https://issues.redhat.com/browse/RHEL-121486

commit d586676
Author: Alok Tiwari <alok.a.tiwari@oracle.com>
Date:   Fri Sep 12 07:14:24 2025 -0700

    ionic: use int type for err in ionic_get_module_eeprom_by_page

    The variable 'err' is declared as u32, but it is used to store
    negative error codes such as -EINVAL.

    Changing the type of 'err' to int ensures proper representation of
    negative error codes and aligns with standard kernel error handling
    conventions.

    Also, there is no need to initialize 'err' since it is always set
    before being used.

    Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com>
    Reviewed-by: Shannon Nelson <sln@onemain.com>
    Reviewed-by: Brett Creeley <brett.creeley@amd.com>
    Link: https://patch.msgid.link/20250912141426.3922545-1-alok.a.tiwari@oracle.com
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Signed-off-by: Jakub Ramaseuski <jramaseu@redhat.com>

Author: Jakub Ramaseuski

drivers/net/ethernet/pensando/ionic/ionic_ethtool.c

@@ -978,7 +978,7 @@ static int ionic_get_module_eeprom_by_page(struct net_device *netdev,
 {
 	struct ionic_lif *lif = netdev_priv(netdev);
 	struct ionic_dev *idev = &lif->ionic->idev;
-	u32 err = -EINVAL;
+	int err;
 	u8 *src;
 
 	if (!page_data->length)