ARM: uniphier: add a field to specify DDR3+

Add a field to distinguish DDR3+ from (standard) DDR3.  It also
allows to delete CONFIG_DDR_STANDARD (this is not a software
configuration, but a board attribute).

Default DDR3 spec for each SoC:

  PH1-LD4, PH1-sLD8: DDR3+
  Others: DDR3

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/boards.c b/arch/arm/mach-uniphier/boards.c
index 05b7c76..408aff0 100644
--- a/arch/arm/mach-uniphier/boards.c
+++ b/arch/arm/mach-uniphier/boards.c
@@ -38,6 +38,7 @@
 static const struct uniphier_board_data ph1_ld4_data = {
 	.dram_freq = 1600,
 	.dram_nr_ch = 2,
+	.dram_ddr3plus = true,
 	.dram_ch[0] = {
 		.base = 0x80000000,
 		.size = 0x10000000,
@@ -89,6 +90,7 @@
 static const struct uniphier_board_data ph1_sld8_data = {
 	.dram_freq = 1333,
 	.dram_nr_ch = 2,
+	.dram_ddr3plus = true,
 	.dram_ch[0] = {
 		.base = 0x80000000,
 		.size = 0x10000000,