cmake: remove xtensa workaround in Zephyr toolchain code.

Remove xtensa specific workaround as this code is now present in Zephyr
SDK cmake code.

Signed-off-by: Torsten Rasmussen <[email protected]>
(cherry picked from commit 92a1ca6)

Author: tejlmand

cmake/toolchain/zephyr/target.cmake

@@ -1,9 +1,3 @@
 # SPDX-License-Identifier: Apache-2.0
 
 include(${ZEPHYR_SDK_INSTALL_DIR}/cmake/zephyr/target.cmake)
-
-# Workaround, FIXME: Waiting for new SDK.
-if("${ARCH}" STREQUAL "xtensa")
-  set(SYSROOT_DIR ${TOOLCHAIN_HOME}/xtensa/${SOC_TOOLCHAIN_NAME}/${SYSROOT_TARGET})
-  set(CROSS_COMPILE ${TOOLCHAIN_HOME}/xtensa/${SOC_TOOLCHAIN_NAME}/${CROSS_COMPILE_TARGET}/bin/${CROSS_COMPILE_TARGET}-)
-endif()