[BUG] Watchdog exception in bootloader when using large files

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cross mob
GrBa_3483646
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WICED-Studio-6.2.1

in /43xxx_Wi-Fi/WICED/platform/MCU/STM32F4xx/WAF/waf_platform.c

function platform_write_flash_chunk()

When a large app should be loaded (~765952 Bytes), the watchdog expires during the function platform_copy_app_to_iflash()!

During erasing of app the function platform_write_flash_chunk() takes care of the watchdog, but kicking of watchdog is missing
in function platform_write_flash_chunk()!

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