ARM: AM33xx+: Update ioregs to pass different values

Currently same value is programmed for all ioregs. This is not
the case for all SoC's like AM4372. So adding a structure for ioregs
and updating in all board files. And also return from config_cmd_ctrl()
and config_ddr_data() functions if data is not passed.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
[trini: Fixup dxr2, cm_t335, adapt pcm051 rev3]
Signed-off-by: Tom Rini <trini@ti.com>
diff --git a/board/siemens/pxm2/board.c b/board/siemens/pxm2/board.c
index 0a25b4b..ef3d6cc 100644
--- a/board/siemens/pxm2/board.c
+++ b/board/siemens/pxm2/board.c
@@ -69,7 +69,15 @@
 	.cmd2iclkout = 0,
 };
 
-	config_ddr(DDR_PLL_FREQ, DXR2_IOCTRL_VAL, &pxm2_ddr3_data,
+const struct ctrl_ioregs ioregs = {
+	.cm0ioctl		= DXR2_IOCTRL_VAL,
+	.cm1ioctl		= DXR2_IOCTRL_VAL,
+	.cm2ioctl		= DXR2_IOCTRL_VAL,
+	.dt0ioctl		= DXR2_IOCTRL_VAL,
+	.dt1ioctl		= DXR2_IOCTRL_VAL,
+};
+
+	config_ddr(DDR_PLL_FREQ, &ioregs, &pxm2_ddr3_data,
 		   &pxm2_ddr3_cmd_ctrl_data, &pxm2_ddr3_emif_reg_data, 0);
 }