This change moves all PDL drivers into common source and include
directories to alleviate issue with Windows version of GNU Make 4.x
maximum command line length limit.
Page size in all PSOC6 boards is 512 bytes. This is very problematic in
all storage applications. This change reduces the page size (in flash_api's
flash_program_page API) to 32 by reading the original page, modifying it
with programmed data and programming it back. The number 32 for page size
conforms to the number of times (16) this action can be done.
The targets/TARGET_Cypress/TARGET_PSOC6 is dedicated to the mbed-os HAL
and PSoC 6 MCU targets developed by Cypress Semiconductor. Move the
existing port developed by Future Electronics to TARGET_PSOC_FUTURE
and update the labels in targets.json appropriately.