Add dummy EIMSK in avr_emulation, undo avr/sleep.h workaround

teensy3/avr/sleep.h

 #define sleep_mode()		sleep_cpu()
 
 // workaround for early versions of Nordic's BLE library
-#if defined(HAL_ACI_TL_H__) && defined(PLATFORM_H__)
-#define EIMSK uint8_t EIMSKworkaround=0; EIMSKworkaround
-#endif
+// EIMSK moved to a dummy byte in avr_emulation...
+//#if defined(HAL_ACI_TL_H__) && defined(PLATFORM_H__)
+//#define EIMSK uint8_t EIMSKworkaround=0; EIMSKworkaround
+//#endif
 
 #endif

teensy3/avr_emulation.cpp

 
 #endif
 
+uint8_t EIMSK = 0;
 
 

teensy3/avr_emulation.h

 };
 extern SREGemulation SREG;
 
+
+extern uint8_t EIMSK;
+
 // these are not intended for public consumption...
 #undef GPIO_BITBAND_ADDR
 #undef GPIO_BITBAND