fix illegal instruction error on devices like p8 and p20

mindspore/lite/CMakeLists.txt

@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.14)
 project(Lite)
 
 if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.3.0)
-    message(FATAL_ERROR "GCC vesion ${CMAKE_CXX_COMPILER_VERSION} must not be less than 7.3.0")
+    message(FATAL_ERROR "GCC version ${CMAKE_CXX_COMPILER_VERSION} must not be less than 7.3.0")
 endif()
 
 option(MS_VERSION_MAJOR "major version" 0)
@@ -189,7 +189,7 @@ endif()
 
 if(PLATFORM_ARM32 OR PLATFORM_ARM64)
     if(NOT DEFINED ENV{ANDROID_NDK})
-        message(FATAL_ERROR "env ANDROID_NDK should be setted for ARM compile")
+        message(FATAL_ERROR "env ANDROID_NDK should be set for ARM compile")
     endif()
     add_compile_definitions(ENABLE_ARM)
 endif()
@@ -199,9 +199,6 @@ if(PLATFORM_ARM32)
 endif()
 if(PLATFORM_ARM64)
     add_compile_definitions(ENABLE_ARM64)
-    if(ENABLE_FP16)
-        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=armv8.2-a+dotprod+fp16")
-    endif()
 endif()
 
 if(PLATFORM_ARM32 OR PLATFORM_ARM64)