Fix compiling with IAR

[asmellby]

__ARM_FEATURE_MVE is defined but set to zero on Cortex-M33, and presumably other non-MVE platforms. Check for bit 0 to be set, indicating integer MVE support. This is consistent with the __ARM_FEATURE_DSP check above.

__RESTRICT was missing from the IAR compiler abstraction.

[mansnils]

@asmellby Thanks for the PR! Can I ask you to update $Date and $Revision according semver.org?
That would be 1.2.1 for arm_nn_compiler.h and 1.3.3 for arm_nn_math_types.h.

[asmellby]

Done!
For reference, the compile errors fixed by this PR are

__STATIC_FORCEINLINE void arm_memcpy_s8(int8_t *__RESTRICT dst, const int8_t *__RESTRICT src, uint32_t block_size)
                                                             ^
"Include/arm_nnsupportfunctions.h",953  Error[Pe018]: 
          expected a ")"

for __RESTRICT and

  __STATIC_FORCEINLINE int32x4_t arm_doubling_high_mult_mve(const int32x4_t m1, const int32_t m2)
                       ^
"Include/arm_nnsupportfunctions.h",990  Error[Pe020]: 
          identifier "int32x4_t" is undefined

and a plethora of others for __ARM_FEATURE_MVE.

[mansnils]

Done! For reference, the compile errors fixed by this PR are

__STATIC_FORCEINLINE void arm_memcpy_s8(int8_t *__RESTRICT dst, const int8_t *__RESTRICT src, uint32_t block_size)
                                                             ^
"Include/arm_nnsupportfunctions.h",953  Error[Pe018]: 
          expected a ")"

for __RESTRICT and

  __STATIC_FORCEINLINE int32x4_t arm_doubling_high_mult_mve(const int32x4_t m1, const int32_t m2)
                       ^
"Include/arm_nnsupportfunctions.h",990  Error[Pe020]: 
          identifier "int32x4_t" is undefined

and a plethora of others for __ARM_FEATURE_MVE.

Thanks and sorry for the slow response!