linux-phytec-ti

arm: dts: phytec: update MMC config and compatible string for SOM EEPROM

MMC configuration updated based on changes from v4.9 to
v4.19 kernels.

Also updated SOM EEPROM compatible string due to previous
value being deprecated.

Signed-off-by: khaleel <khaleel.s@phytec.in>
Signed-off-by: Matt McKee <mmckee@phytec.com>