stmicro/stmmac: fix repeated words in comments

Delete the redundant word 'all'.
Signed-off-by: Jilin Yuan <yuanjilin@cdjrlc.com>
Link: https://lore.kernel.org/r/20220630125222.14357-1-yuanjilin@cdjrlc.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/stmicro/stmmac/mmc_core.c

@@ -197,7 +197,7 @@ static void dwmac_mmc_ctrl(void __iomem *mmcaddr, unsigned int mode)
 		 MMC_CNTRL, value);
 }
 
-/* To mask all all interrupts.*/
+/* To mask all interrupts.*/
 static void dwmac_mmc_intr_all_mask(void __iomem *mmcaddr)
 {
 	writel(MMC_DEFAULT_MASK, mmcaddr + MMC_RX_INTR_MASK);