For future reference,
I was checking the myconfig.h file and found some variable definition regarding the NRF24 radio.
There were two variables referencing the CE and CS pin.
/**
* @def MY_RF24_CE_PIN
* @brief Define this to change the chip enable pin from the default.
*/
#ifndef MY_RF24_CE_PIN
#define MY_RF24_CE_PIN (DEFAULT_RF24_CE_PIN)
#endif
/**
* @def MY_RF24_CS_PIN
* @brief Define this to change the chip select pin from the default.
*/
#ifndef MY_RF24_CS_PIN
#define MY_RF24_CS_PIN (DEFAULT_RF24_CS_PIN)
#endif
I have set these two variables in my sketch for my MRKZERO and got the radio working.
Problem Solved 
