shields: add st x-nucleo-eeprma2 eeprom shiled for m24xx, m95xx devices

This commit adds st microelectronics x-nucleo-eeprma2 shield,
which has populated 6 different i2c and spi eeproms.
They are all compatible with the existing at24 and at25 drivers.

Signed-off-by: Thomas Stranger <thomas.stranger@outlook.com>