[avr] Fix swapped Mode 1 and 2 in AVR SPI driver

The SPI modes 1 and 2 were swapped in the AT90, ATTINY and ATMEGA SPI
driver. The SPI UART driver is not affected and has always been using
the correct modes.

src/modm/platform/spi/at90_tiny_mega/spi_master.hpp.in

@@ -61,9 +61,9 @@ public:
 	DataMode : uint8_t
 	{
 		Mode0 = 0,	///< clock normal,   sample on rising  edge
-		Mode1 = (1 << CPOL{{ id }}),	///< clock normal,   sample on falling edge
-		Mode2 = (1 << CPHA{{ id }}),	///< clock inverted, sample on rising  edge
-		Mode3 = (1 << CPOL{{ id }}) | (1 << CPHA{{ id }}),	///< clock inverted, sample on falling edge
+		Mode1 = (1 << CPHA{{ id }}),	///< clock normal,   sample on falling edge
+		Mode2 = (1 << CPOL{{ id }}),	///< clock inverted, sample on falling  edge
+		Mode3 = (1 << CPOL{{ id }}) | (1 << CPHA{{ id }}),	///< clock inverted, sample on rising edge
 	};
 
 public: