net: phy: mscc: fix excluded_middle.cocci warnings

Condition !A || A && B is equivalent to !A || B.

Generated by: scripts/coccinelle/misc/excluded_middle.cocci
Reported-by: Nkernel test robot <lkp@intel.com>
Signed-off-by: Nkernel test robot <lkp@intel.com>
Signed-off-by: NJulia Lawall <julia.lawall@inria.fr>
Reviewed-by: NAntoine Tenart <atenart@kernel.org>
Link: https://lore.kernel.org/r/alpine.DEB.2.22.394.2011161633240.2682@hadrienSigned-off-by: NJakub Kicinski <kuba@kernel.org>

drivers/net/phy/mscc/mscc_ptp.c

@@ -136,7 +136,7 @@ static void vsc85xx_ts_write_csr(struct phy_device *phydev, enum ts_blk blk,
 
 	phy_ts_base_write(phydev, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_1588);
 
-	if (!cond || (cond && upper))
+	if (!cond || upper)
 		phy_ts_base_write(phydev, MSCC_PHY_TS_CSR_DATA_MSB, upper);
 
 	phy_ts_base_write(phydev, MSCC_PHY_TS_CSR_DATA_LSB, lower);