Frenzy/Skids/Prowl: config cleanup

1. Remove CONFIG_CROSS_COMPILE
   - pointing to non-existent toolchain
   - buildroot overrides it with "make ARCH=... CROSS_COMPILE=..."

2. Remove CONFIG_INITRAMFS_SOURCE
   - pointing to non-existent cpio archive
   - buildroot populates it with the proper cpio archive path

Change-Id: I154433f3a934f7b7d91b73e63c4bf938687df038
diff --git a/arch/arc/configs/gfex250_defconfig b/arch/arc/configs/gfex250_defconfig
index 13e1c55..a841a01 100644
--- a/arch/arc/configs/gfex250_defconfig
+++ b/arch/arc/configs/gfex250_defconfig
@@ -31,7 +31,6 @@
 # CONFIG_EXPERIMENTAL is not set
 CONFIG_BROKEN_ON_SMP=y
 CONFIG_INIT_ENV_ARG_LIMIT=32
-CONFIG_CROSS_COMPILE="/usr/local/ARC/gcc/bin/arc-linux-uclibc-"
 CONFIG_LOCALVERSION=""
 # CONFIG_LOCALVERSION_AUTO is not set
 # CONFIG_SWAP is not set
@@ -57,7 +56,6 @@
 # CONFIG_RELAY is not set
 # CONFIG_NAMESPACES is not set
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_INITRAMFS_SOURCE="../buildroot/rootfs.arc-linux-uclibc.cpio"
 CONFIG_INITRAMFS_ROOT_UID=0
 CONFIG_INITRAMFS_ROOT_GID=0
 # CONFIG_RD_GZIP is not set
diff --git a/arch/arc/configs/gffrenzy_defconfig b/arch/arc/configs/gffrenzy_defconfig
index 31170c4..06631ed 100644
--- a/arch/arc/configs/gffrenzy_defconfig
+++ b/arch/arc/configs/gffrenzy_defconfig
@@ -31,7 +31,6 @@
 # CONFIG_EXPERIMENTAL is not set
 CONFIG_BROKEN_ON_SMP=y
 CONFIG_INIT_ENV_ARG_LIMIT=32
-CONFIG_CROSS_COMPILE="/usr/local/ARC/gcc/bin/arc-linux-uclibc-"
 CONFIG_LOCALVERSION=""
 # CONFIG_LOCALVERSION_AUTO is not set
 # CONFIG_SWAP is not set
@@ -57,7 +56,6 @@
 # CONFIG_RELAY is not set
 # CONFIG_NAMESPACES is not set
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_INITRAMFS_SOURCE="../buildroot/rootfs.arc-linux-uclibc.cpio"
 CONFIG_INITRAMFS_ROOT_UID=0
 CONFIG_INITRAMFS_ROOT_GID=0
 # CONFIG_RD_GZIP is not set