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Update `lan78xx_phy_wait_not_busy` to forward errors from `lan78xx_read_reg` instead of overwriting them with `-EIO`. Replace `-EIO` with `-ETIMEDOUT` for timeout cases, providing more specific and appropriate error codes. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20241209130751.703182-10-o.rempel@pengutronix.de Signed-off-by: Jakub Kicinski <kuba@kernel.org>