ARM: uniphier: merge two defconfig files into uniphier_v7_defconfig

The main difference between Pro4 and PXs2/LD6b is the Denali NAND
IP version.  This is now distinguished by DT.  Merge the two defconfig
files into uniphier_v7_defconfig.

Update the README.uniphier too.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/Kconfig b/arch/arm/mach-uniphier/Kconfig
index ee22112..c8b5ab4 100644
--- a/arch/arm/mach-uniphier/Kconfig
+++ b/arch/arm/mach-uniphier/Kconfig
@@ -12,18 +12,14 @@
 
 choice
         prompt "UniPhier SoC select"
-        default ARCH_UNIPHIER_PRO4
+        default ARCH_UNIPHIER_V8_MULTI
 
 config ARCH_UNIPHIER_LD4_SLD8
 	bool "UniPhier LD4/sLD8 SoCs"
 	select ARCH_UNIPHIER_32BIT
 
-config ARCH_UNIPHIER_PRO4
-	bool "UniPhier Pro4 SoC"
-	select ARCH_UNIPHIER_32BIT
-
-config ARCH_UNIPHIER_PRO5_PXS2_LD6B
-	bool "UniPhier Pro5/PXs2/LD6b SoCs"
+config ARCH_UNIPHIER_V7_MULTI
+	bool "UniPhier Pro4/Pro5/PXs2/LD6b SoCs"
 	select ARCH_UNIPHIER_32BIT
 
 config ARCH_UNIPHIER_V8_MULTI
@@ -44,19 +40,24 @@
 	depends on ARCH_UNIPHIER_LD4_SLD8
 	default y
 
+config ARCH_UNIPHIER_PRO4
+	bool "Enable UniPhier Pro4 SoC support"
+	depends on ARCH_UNIPHIER_V7_MULTI
+	default y
+
 config ARCH_UNIPHIER_PRO5
 	bool "Enable UniPhier Pro5 SoC support"
-	depends on ARCH_UNIPHIER_PRO5_PXS2_LD6B
+	depends on ARCH_UNIPHIER_V7_MULTI
 	default y
 
 config ARCH_UNIPHIER_PXS2
 	bool "Enable UniPhier Pxs2 SoC support"
-	depends on ARCH_UNIPHIER_PRO5_PXS2_LD6B
+	depends on ARCH_UNIPHIER_V7_MULTI
 	default y
 
 config ARCH_UNIPHIER_LD6B
 	bool "Enable UniPhier LD6b SoC support"
-	depends on ARCH_UNIPHIER_PRO5_PXS2_LD6B
+	depends on ARCH_UNIPHIER_V7_MULTI
 	default y
 
 config ARCH_UNIPHIER_LD11