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/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