ARM: OMAP2+: am33xx: fix serial mux warnings for am33xx

The patch removes below warning in serial mux setup on AM335x platform

[    0.162052] _omap_mux_get_by_name: Could not find signal
uart1_cts.uart1_cts
[    0.169437] omap_hwmod_mux_init: Could not allocate device mux entry
[    0.176384] _omap_mux_get_by_name: Could not find signal
uart2_cts.uart2_cts
[    0.183735] omap_hwmod_mux_init: Could not allocate device mux entry
[    0.190663] _omap_mux_get_by_name: Could not find signal
uart3_cts_rctx.uart3_cts_rctx
[    0.198926] omap_hwmod_mux_init: Could not allocate device mux entry

Signed-off-by: Hebbar, Gururaja <gururaja.hebbar@ti.com>

arch/arm/mach-omap2/serial.c

@@ -409,7 +409,8 @@ void __init omap_serial_board_init(struct omap_uart_port_info *info)
 		bdata.pads = NULL;
 		bdata.pads_cnt = 0;
 
-		if (cpu_is_omap44xx() || cpu_is_omap34xx())
+		if (cpu_is_omap44xx() || (cpu_is_omap34xx() &&
+							!cpu_is_am33xx()))
 			omap_serial_fill_default_pads(&bdata);
 
 		if (!info)