ARM: UniPhier: update the vendor name of UniPhier in Kconfig

The business for UniPhier Soc family has been transferred from
Panasonic Corporation to Socionext Inc.

Update the SoC select menu in Kconfig.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index b62842f..2985e6e 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -786,7 +786,7 @@
 	select CPU_SA1100
 
 config ARCH_UNIPHIER
-	bool "Panasonic UniPhier platform"
+	bool "Socionext UniPhier SoCs"
 	select CPU_V7
 	select SUPPORT_SPL
 	select SPL
@@ -794,6 +794,9 @@
 	select DM
 	select DM_SERIAL
 	select DM_I2C
+	help
+	  Support for UniPhier SoC family developed by Socionext Inc.
+	  (formerly, System LSI Business Division of Panasonic Corporation)
 
 config TARGET_STM32F429_DISCOVERY
 	bool "Support STM32F429 Discovery"
diff --git a/arch/arm/mach-uniphier/Kconfig b/arch/arm/mach-uniphier/Kconfig
index 2d27c49..73b8676 100644
--- a/arch/arm/mach-uniphier/Kconfig
+++ b/arch/arm/mach-uniphier/Kconfig
@@ -1,5 +1,4 @@
-menu "Panasonic UniPhier platform"
-	depends on ARCH_UNIPHIER
+if ARCH_UNIPHIER
 
 config SYS_CONFIG_NAME
 	default "uniphier"
@@ -78,4 +77,4 @@
 	default 1333 if DDR_FREQ_1333
 	default 1600 if DDR_FREQ_1600
 
-endmenu
+endif