boards: lpcxpresso55s69: switch to use the TFM_PROFILE_TYPE choice

Switch the default LPC board configuration to select the
TFM_PROFILE_TYPE_MEDIUM choice, instead of directly setting
the TFM_PROFILE variable, as this is now made hidden.

Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
1 file changed