stmmac: intel: Add a missing clk_disable_unprepare() call in intel_eth_pci_remove()

jira VULN-71070
cve CVE-2022-50039
commit-author Christophe JAILLET <christophe.jaillet@wanadoo.fr>
commit 5c23d6b

Commit 09f012e ("stmmac: intel: Fix clock handling on error and remove
paths") removed this clk_disable_unprepare()

This was partly revert by commit ac322f8 ("net: stmmac: Fix clock
handling on remove path") which removed this clk_disable_unprepare()
because:
"
   While unloading the dwmac-intel driver, clk_disable_unprepare() is
   being called twice in stmmac_dvr_remove() and
   intel_eth_pci_remove(). This causes kernel panic on the second call.
"

However later on, commit 5ec5582 ("net: stmmac: add clocks management
for gmac driver") has updated stmmac_dvr_remove() which do not call
clk_disable_unprepare() anymore.

So this call should now be called from intel_eth_pci_remove().

Fixes: 5ec5582 ("net: stmmac: add clocks management for gmac driver")
	Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
	Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/d7c8c1dadf40df3a7c9e643f76ffadd0ccc1ad1b.1660659689.git.christophe.jaillet@wanadoo.fr
	Signed-off-by: Jakub Kicinski <kuba@kernel.org>
(cherry picked from commit 5c23d6b)
	Signed-off-by: Jonathan Maple <jmaple@ciq.com>

Author: PlaidCat

drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c

@@ -1033,6 +1033,7 @@ static void intel_eth_pci_remove(struct pci_dev *pdev)
 
 	stmmac_dvr_remove(&pdev->dev);
 
+	clk_disable_unprepare(priv->plat->stmmac_clk);
 	clk_unregister_fixed_rate(priv->plat->stmmac_clk);
 
 	pcim_iounmap_regions(pdev, BIT(0));