aarch64: Fix wrong cmake.conf values caused by TARGET_PREFIX when

building just linux and starting a regular build later.

packages/linux/package.mk

@@ -76,8 +76,10 @@ esac
 if [ "$TARGET_KERNEL_ARCH" = "arm64" -a "$TARGET_ARCH" = "arm" ]; then
   PKG_DEPENDS_HOST="$PKG_DEPENDS_HOST gcc-linaro-aarch64-linux-gnu:host"
   PKG_DEPENDS_TARGET="$PKG_DEPENDS_TARGET gcc-linaro-aarch64-linux-gnu:host"
-  TARGET_PREFIX=$TOOLCHAIN/lib/gcc-linaro-aarch64-linux-gnu/bin/aarch64-linux-gnu-
+  PKG_TARGET_PREFIX=$TOOLCHAIN/lib/gcc-linaro-aarch64-linux-gnu/bin/aarch64-linux-gnu-
   HEADERS_ARCH=$TARGET_ARCH
+else
+  PKG_TARGET_PREFIX=$TARGET_PREFIX
 fi
 
 PKG_MAKE_OPTS_HOST="ARCH=${HEADERS_ARCH:-$TARGET_KERNEL_ARCH} headers_check"
@@ -115,7 +117,7 @@ post_patch() {
   sed -i -e "s|^HOSTCC[[:space:]]*=.*$|HOSTCC = $TOOLCHAIN/bin/host-gcc|" \
          -e "s|^HOSTCXX[[:space:]]*=.*$|HOSTCXX = $TOOLCHAIN/bin/host-g++|" \
          -e "s|^ARCH[[:space:]]*?=.*$|ARCH = $TARGET_KERNEL_ARCH|" \
-         -e "s|^CROSS_COMPILE[[:space:]]*?=.*$|CROSS_COMPILE = $TARGET_PREFIX|" \
+         -e "s|^CROSS_COMPILE[[:space:]]*?=.*$|CROSS_COMPILE = $PKG_TARGET_PREFIX|" \
          $PKG_BUILD/Makefile
 
   cp $KERNEL_CFG_FILE $PKG_BUILD/.config