phy: xilinx-xhdmiphy: Fix bug in xhdmiphy_rpll_param function

Calculation of RPLL params fails in FRL mode. Fix the typo causing this.

Signed-off-by: Rajesh Gugulothu <rajesh.gugulothu@amd.com>
Reviewed-by: Vishal Sagar <vishal.sagar@amd.com>

Author: gugulot

drivers/phy/xilinx/xhdmiphy_modules.c

@@ -865,7 +865,7 @@ static u32 xhdmiphy_rpll_param(struct xhdmiphy_dev *inst, enum chid chid,
 	/* Pre-calculation */
 	if (dir == XHDMIPHY_DIR_RX) {
 		refclk_ptr = &inst->rx_refclk_hz;
-		is_hdmi21 = inst->tx_hdmi21_cfg.is_en;
+		is_hdmi21 = inst->rx_hdmi21_cfg.is_en;
 		tmdsclk_ratio = inst->rx_tmdsclock_ratio;
 
 		/* calculate line rate */