arc: allow to test upstream support of gcc/binutils

target/config/Config.in.binutils

@@ -10,13 +10,11 @@ default ADK_TOOLCHAIN_BINUTILS_2_28
 
 config ADK_TOOLCHAIN_BINUTILS_GIT
 	bool "git"
-	depends on !ADK_TARGET_ARCH_ARC
 	depends on !ADK_TARGET_ARCH_AVR32
 	depends on !ADK_TARGET_ARCH_NDS32
 
 config ADK_TOOLCHAIN_BINUTILS_2_28
 	bool "2.28"
-	depends on !ADK_TARGET_ARCH_ARC
 	depends on !ADK_TARGET_ARCH_AVR32
 	depends on !ADK_TARGET_ARCH_NDS32
 	depends on !ADK_TARGET_ARCH_RISCV32

target/config/Config.in.compiler

@@ -30,7 +30,6 @@ default ADK_TOOLCHAIN_GCC_6
 
 config ADK_TOOLCHAIN_GCC_GIT
 	bool "git"
-	depends on !ADK_TARGET_ARCH_ARC
 	depends on !ADK_TARGET_ARCH_AVR32
 	depends on !ADK_TARGET_ARCH_METAG
 	depends on !ADK_TARGET_ARCH_NDS32
@@ -39,7 +38,6 @@ config ADK_TOOLCHAIN_GCC_GIT
 
 config ADK_TOOLCHAIN_GCC_7
 	bool "7.1.0"
-	depends on !ADK_TARGET_ARCH_ARC
 	depends on !ADK_TARGET_ARCH_AVR32
 	depends on !ADK_TARGET_ARCH_CRIS
 	depends on !ADK_TARGET_ARCH_METAG