net: stmmac: increase delay of SWR for specific PHY with lots of latency

During suspend/resume sequence, in resume we performed software reset (SWR).
Just before SWR we performed phy_start, and sometimes phy is not completely
start when we perform it.
Need to increase delay of SWR sequence to be sure that phy start is complete.

Signed-off-by: Christophe Roullier <christophe.roullier@st.com>
Change-Id: I756065bc875bacc7e3900e218b6deacc5c3448da
Reviewed-on: https://gerrit.st.com/c/mpu/oe/st/linux-stm32/+/142222
Reviewed-by: CITOOLS <smet-aci-reviews@lists.codex.cro.st.com>
Reviewed-by: CIBUILD <smet-aci-builds@lists.codex.cro.st.com>
Reviewed-by: Alexandre TORGUE <alexandre.torgue@st.com>

Author: Christophe Roullier

drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c

@@ -22,7 +22,7 @@ int dwmac4_dma_reset(void __iomem *ioaddr)
 	/* DMA SW reset */
 	value |= DMA_BUS_MODE_SFT_RESET;
 	writel(value, ioaddr + DMA_BUS_MODE);
-	limit = 10;
+	limit = 100;
 	while (limit--) {
 		if (!(readl(ioaddr + DMA_BUS_MODE) & DMA_BUS_MODE_SFT_RESET))
 			break;