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/ti/ti816x/evm.c b/board/ti/ti816x/evm.c
index a53859e..b6bf162 100644
--- a/board/ti/ti816x/evm.c
+++ b/board/ti/ti816x/evm.c
@@ -191,22 +191,26 @@
 	if (CONFIG_TI816X_USE_EMIF0) {
 		ddr2_emif0_regs.emif_ddr_phy_ctlr_1 =
 			(get_cpu_rev() == 0x1 ? 0x0000010B : 0x0000030B);
-		config_ddr(0, 0, &ddr2_data, &ddr2_ctrl, &ddr2_emif0_regs, 0);
+		config_ddr(0, NULL, &ddr2_data, &ddr2_ctrl, &ddr2_emif0_regs,
+			   0);
 	}
 
 	if (CONFIG_TI816X_USE_EMIF1) {
 		ddr2_emif1_regs.emif_ddr_phy_ctlr_1 =
 			(get_cpu_rev() == 0x1 ? 0x0000010B : 0x0000030B);
-		config_ddr(1, 0, &ddr2_data, &ddr2_ctrl, &ddr2_emif1_regs, 1);
+		config_ddr(1, NULL, &ddr2_data, &ddr2_ctrl, &ddr2_emif1_regs,
+			   1);
 	}
 #endif
 
 #ifdef CONFIG_TI816X_EVM_DDR3
 	if (CONFIG_TI816X_USE_EMIF0)
-		config_ddr(0, 0, &ddr3_data, &ddr3_ctrl, &ddr3_emif0_regs, 0);
+		config_ddr(0, NULL, &ddr3_data, &ddr3_ctrl, &ddr3_emif0_regs,
+			   0);
 
 	if (CONFIG_TI816X_USE_EMIF1)
-		config_ddr(1, 0, &ddr3_data, &ddr3_ctrl, &ddr3_emif1_regs, 1);
+		config_ddr(1, NULL, &ddr3_data, &ddr3_ctrl, &ddr3_emif1_regs,
+			   1);
 #endif
 }
 #endif /* CONFIG_SPL_BUILD */