Method wait

src/platforms/arm/k66/fastspi_arm_k66.h:315–315

	static bool needwait() __attribute__((always_inline)) { return (SPIX.SR & 0x4000); }
	static void wait() __attribute__((always_inline)) { while( (SPIX.SR & 0x4000) );  }
	static void wait1() __attribute__((always_inline)) { while( (SPIX.SR & 0xF000) >= 0x2000);  }

	enum ECont { CONT, NOCONT };