Hello @MuhammedAhmet
At first sight, it looks that you are on the right track. You have enabled two SPI instances and yes, you have to modify the bcc_peripheries for the driver to call the instances/ chip selects you use for the board.
More than that, the article How-to-use-your-own-C-code... is handling the MC3377xB which has a different driver and different settings than the ones for the MC3377xC. So you need to use also the driver from here: EMBEDDED-SW-MC33771C
What setup are you using? the one from the UM11310?
Regards,
Marius