Enable SPI1 on Teensy-LC

SPI.cpp

 #elif defined(__arm__) && defined(TEENSYDUINO) && defined(KINETISL)
 
 SPIClass SPI;
+SPI1Class SPI1;
 
 uint32_t SPIClass::interruptMask = 0;
 uint32_t SPIClass::interruptSave = 0;

SPI.h

 		}
 		inTransactionFlag = 1;
 		#endif
-		//  TODO: this is wrong for SPI1 - how to make SPI settings scale?
 		SPI1_C1 = settings.c1;
 		SPI1_BR = settings.br1;
 	}
 
 	// This function is deprecated.	 New applications should use
 	// beginTransaction() to configure SPI settings.
-	//  TODO: this is wrong for SPI1 - how to make SPI settings scale?
 	inline static void setClockDivider(uint8_t clockDiv) {
 		if (clockDiv == SPI_CLOCK_DIV2) {
 			SPI1_BR = (SPISettings(8000000, MSBFIRST, SPI_MODE0).br1);
 
 
 extern SPIClass SPI;
+#if defined(__arm__) && defined(TEENSYDUINO) && defined(KINETISL)
+extern SPI1Class SPI1;
+#endif
 
 #endif

keywords.txt

 #######################################
 
 SPI	KEYWORD1
+SPI1	KEYWORD1
 
 #######################################
 # Methods and Functions (KEYWORD2)