stm32: flash: fix flash erase on stm32f3xx series #3744
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STM32F3xx series also needs a wait of at least one clock cycle before reading the BSY bit during a flash erase - previously this was only applied to STM32F1xx series.
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Fix for flash erase not working on STM32F3 series (tested on STM32F303K8 specifically).
STM32F3xx series also needs a wait of at least one clock cycle before reading the BSY bit during a flash erase - previously this was only applied to STM32F1xx series.
This was causing an erase failure due to the
wait_ready_blockingnot actually waiting until the erase operation is complete, and as a result the EOP bit was not set when checked.