ARM: uniphier: fix makefiles to build cmd_ddr(m)phy.c

The U-Boot proper building needs to descend arch/arm/mach-uniphier/dram
to build these commands.

Fixes: 93d92d46cd01 ("ARM: uniphier: add dump command for DDR Multi PHY registers")
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/dram/Makefile b/arch/arm/mach-uniphier/dram/Makefile
index cab7df1..a0a6003 100644
--- a/arch/arm/mach-uniphier/dram/Makefile
+++ b/arch/arm/mach-uniphier/dram/Makefile
@@ -2,6 +2,8 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
+ifdef CONFIG_SPL_BUILD
+
 obj-$(CONFIG_ARCH_UNIPHIER_PH1_LD4)	+= umc-ph1-ld4.o \
 					   ddrphy-training.o ddrphy-ph1-ld4.o
 obj-$(CONFIG_ARCH_UNIPHIER_PH1_PRO4)	+= umc-ph1-pro4.o \
@@ -11,5 +13,9 @@
 obj-$(CONFIG_ARCH_UNIPHIER_PROXSTREAM2)	+= umc-proxstream2.o
 obj-$(CONFIG_ARCH_UNIPHIER_PH1_LD6B)	+= umc-proxstream2.o
 
+else
+
 obj-$(CONFIG_CMD_DDRPHY_DUMP) += cmd_ddrphy.o
 obj-$(CONFIG_CMD_DDRMPHY_DUMP) += cmd_ddrmphy.o
+
+endif