spi: ti_qspi: Remove delay in read path for dra7xx

As per commit b545a98f5d ("spi: ti_qspi: Add delay
for successful bulk erase) says its added to meet bulk erase timing
constraints. But bulk erase is a cmd to flash and delay in read path
does not make sense. Morever, testing on DRA74/DRA72 evm has shown that
this delay is no longer required.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Reviewed-by: Jagan Teki <jteki@openedev.com>
Reviewed-by: Mugunthan V N <mugunthanvnm@ti.com>

drivers/spi/ti_qspi.c

@@ -249,9 +249,6 @@ static int __ti_qspi_xfer(struct ti_qspi_priv *priv, unsigned int bitlen,
 		if (rxp) {
 			debug("rx cmd %08x dc %08x\n",
 			      ((u32)(priv->cmd | QSPI_RD_SNGL)), priv->dc);
-			#ifdef CONFIG_DRA7XX
-				udelay(500);
-			#endif
 			writel(priv->cmd | QSPI_RD_SNGL, &priv->base->cmd);
 			status = readl(&priv->base->status);
 			timeout = QSPI_TIMEOUT;