net: phy: micrel: use %pe in print format

net: phy: micrel: use %pe in print format

New cocci check complains:

  drivers/net/phy/micrel.c:4308:6-13: WARNING: Consider using %pe to print PTR_ERR()
  drivers/net/phy/micrel.c:5742:6-13: WARNING: Consider using %pe to print PTR_ERR()

Link: https://lore.kernel.org/1758192227-701925-1-git-send-email-tariqt@nvidia.com
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20250918183119.2396019-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>