drivers: flash: stm32f4: Don't invert an already inverted mask

Clearing the PSIZE bits in the FLASH CR should not invert the mask
defined in stm32f4xx_hal_flash.h (#define CR_PSIZE_MASK 0xFFFFFCFFU)

Signed-off-by: Justin Brederveld <jmbrederveld@gmail.com>
1 file changed