removed some inlines causing issues [issue 6875]

Author: Tech-TX

cores/esp8266/core_esp8266_si2c.cpp

@@ -147,7 +147,7 @@ class Twi
     uint8_t transmit(const uint8_t* data, uint8_t length);
     void attachSlaveRxEvent(void (*function)(uint8_t*, size_t));
     void attachSlaveTxEvent(void (*function)(void));
-    inline void ICACHE_RAM_ATTR reply(uint8_t ack);
+    void ICACHE_RAM_ATTR reply(uint8_t ack);
     inline void ICACHE_RAM_ATTR stop(void);
     inline void ICACHE_RAM_ATTR releaseBus(void);
     void enableSlave();
@@ -501,7 +501,7 @@ void Twi::attachSlaveTxEvent(void (*function)(void))
     twi_onSlaveTransmit = function;
 }
 
-inline void ICACHE_RAM_ATTR Twi::reply(uint8_t ack)
+void ICACHE_RAM_ATTR Twi::reply(uint8_t ack)
 {
     // transmit master read ready signal, with or without ack
     if (ack)