Added support for flash chips

Microchip Quad SPI flash: SST26VF016B, SST26VF016B,SST26VF016B, SST26VF064B

Author: ross-satchell

ports/atmel-samd/boards/microchip_curiosity_circuitpython_nano/mpconfigboard.mk

@@ -8,7 +8,7 @@ CHIP_FAMILY = same51
 
 # QSPI_FLASH_FILESYSTEM = 1
 INTERNAL_FLASH_FILESYSTEM = 1
-EXTERNAL_FLASH_DEVICES = "SST26VF064B"
+EXTERNAL_FLASH_DEVICES = "SST26VF016B,SST26VF032B,SST26VF064B"
 LONGINT_IMPL = MPZ
 CIRCUITPY_ULAB = 0