ARM: uniphier: drop PH1- prefix from CONFIG options and file names

The current CONFIG names like "CONFIG_ARCH_UNIPHIER_PH1_PRO4" is too
long.  It would not hurt to drop "PH1_" because "UNIPHIER_" already
well specifies the SoC family.  Also, rename files for consistency.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/bcu/Makefile b/arch/arm/mach-uniphier/bcu/Makefile
index b8b0323..02107b3 100644
--- a/arch/arm/mach-uniphier/bcu/Makefile
+++ b/arch/arm/mach-uniphier/bcu/Makefile
@@ -2,6 +2,6 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-obj-$(CONFIG_ARCH_UNIPHIER_PH1_SLD3)	+= bcu-ph1-sld3.o
-obj-$(CONFIG_ARCH_UNIPHIER_PH1_LD4)	+= bcu-ph1-ld4.o
-obj-$(CONFIG_ARCH_UNIPHIER_PH1_SLD8)	+= bcu-ph1-ld4.o
+obj-$(CONFIG_ARCH_UNIPHIER_SLD3)	+= bcu-sld3.o
+obj-$(CONFIG_ARCH_UNIPHIER_LD4)		+= bcu-ld4.o
+obj-$(CONFIG_ARCH_UNIPHIER_SLD8)	+= bcu-ld4.o