Zephyr replaces the toolchain version of stdint.h to define uint32_t and int32_t as int rather than long. This breaks the ARM MVE intrinics which require uint32_t to be defined as unsigned long. Define 'ZEPHYR_USE_TOOLCHAIN_STDINT_H_' as that causes zephyr_stdint.h to be skipped, ensuring that the normal stdint.h types are used instead. Signed-off-by: Keith Packard <keithp@keithp.com>