Allow setMISO/setMOSI/setSCK - after begin

Made the SPI code work like the old stuff where you could set the miso/mosi/sck pins after the begin.

Some people actually used this for changing SPI on the fly to use multiple sets of pins

SPI.cpp

 	if (pin != hardware().mosi_pin[mosi_pin_index]) {
 		for (unsigned int i = 0; i < sizeof(hardware().mosi_pin); i++) {
 			if  (pin == hardware().mosi_pin[i]) {
+				if (hardware().clock_gate_register & hardware().clock_gate_mask) {
+					volatile uint32_t *reg;
+					reg = portConfigRegister(hardware().mosi_pin[mosi_pin_index]);
+					*reg = 0;
+					reg = portConfigRegister(hardware().mosi_pin[i]);
+					*reg = hardware().mosi_mux[i];
+				}	
 				mosi_pin_index = i;
 				return;
 			}
 	if (pin != hardware().miso_pin[miso_pin_index]) {
 		for (unsigned int i = 0; i < sizeof(hardware().miso_pin); i++) {
 			if  (pin == hardware().miso_pin[i]) {
+				if (hardware().clock_gate_register & hardware().clock_gate_mask) {
+					volatile uint32_t *reg;
+					reg = portConfigRegister(hardware().miso_pin[miso_pin_index]);
+					*reg = 0;
+					reg = portConfigRegister(hardware().miso_pin[i]);
+					*reg = hardware().miso_mux[i];
+				}	
 				miso_pin_index = i;
 				return;
 			}
 	if (pin != hardware().sck_pin[sck_pin_index]) {
 		for (unsigned int i = 0; i < sizeof(hardware().sck_pin); i++) {
 			if  (pin == hardware().sck_pin[i]) {
+				if (hardware().clock_gate_register & hardware().clock_gate_mask) {
+					volatile uint32_t *reg;
+					reg = portConfigRegister(hardware().sck_pin[sck_pin_index]);
+					*reg = 0;
+					reg = portConfigRegister(hardware().sck_pin[i]);
+					*reg = hardware().sck_mux[i];
+				}	
 				sck_pin_index = i;
 				return;
 			}
 	if (pin != hardware().mosi_pin[mosi_pin_index]) {
 		for (unsigned int i = 0; i < sizeof(hardware().mosi_pin); i++) {
 			if (pin == hardware().mosi_pin[i] ) {
+				if (hardware().clock_gate_register & hardware().clock_gate_mask) {
+					volatile uint32_t *reg;
+					reg = portConfigRegister(hardware().mosi_pin[mosi_pin_index]);
+					*reg = 0;
+					reg = portConfigRegister(hardware().mosi_pin[i]);
+					*reg = hardware().mosi_mux[i];
+				}	
 				mosi_pin_index = i;
 				return;
 			}
 	if (pin != hardware().miso_pin[miso_pin_index]) {
 		for (unsigned int i = 0; i < sizeof(hardware().miso_pin); i++) {
 			if (pin == hardware().miso_pin[i] ) {
+				if (hardware().clock_gate_register & hardware().clock_gate_mask) {
+					volatile uint32_t *reg;
+					reg = portConfigRegister(hardware().miso_pin[miso_pin_index]);
+					*reg = 0;
+					reg = portConfigRegister(hardware().miso_pin[i]);
+					*reg = hardware().miso_mux[i];
+				}	
 				miso_pin_index = i;
 				return;
 			}
 	if (pin != hardware().sck_pin[sck_pin_index]) {
 		for (unsigned int i = 0; i < sizeof(hardware().sck_pin); i++) {
 			if (pin == hardware().sck_pin[i] ) {
+				if (hardware().clock_gate_register & hardware().clock_gate_mask) {
+					volatile uint32_t *reg;
+					reg = portConfigRegister(hardware().sck_pin[sck_pin_index]);
+					*reg = 0;
+					reg = portConfigRegister(hardware().sck_pin[i]);
+					*reg = hardware().sck_mux[i];
+				}	
 				sck_pin_index = i;
 				return;
 			}