cmake: convert INTEL_ARCH to upper

    set(INTEL_ARCH_VALUES cpu knl)

    set_property(CACHE INTEL_ARCH PROPERTY STRINGS ${INTEL_ARCH_VALUES})

    validate_option(INTEL_ARCH INTEL_ARCH_VALUES)

    string(TOLOWER ${INTEL_ARCH} INTEL_ARCH)

    string(TOUPPER ${INTEL_ARCH} INTEL_ARCH)

    if(INTEL_ARCH STREQUAL "knl")

    if(INTEL_ARCH STREQUAL "CPU")

      set(CMAKE_EXE_LINKER_FLAGS  "${CMAKE_EXE_LINKER_FLAGS} -xHost -qopenmp -qoffload")

      set(MIC_OPTIONS "-qoffload-option,mic,compiler,\"-fp-model fast=2 -mGLOB_default_function_attrs=\\\"gather_scatter_loop_unroll=4\\\"\"")

      add_compile_options(-xMIC-AVX512 -qoffload -fno-alias -ansi-alias -restrict -qoverride-limits ${MIC_OPTIONS})