spi: don't shift into "QPI" mode

Assume we're not running in QPI mode.

There were some issues involving corruption that were observed as a
result of shifting into QPI mode when in SPI mode.  Disable this change.

Signed-off-by: Sean Cross <sean@xobs.io>

sw/src/spi.c

@@ -640,9 +640,6 @@ int spiBeginWrite(uint32_t addr, const void *v_data, unsigned int count) {
 uint8_t spiReset(void) {
 	// XXX You should check the "Ready" bit before doing this!
 
-	// Shift to QPI mode, then back to Single mode, to ensure
-	// we're actually in Single mode.
-	spiSetType(ST_QPI);
 	spiSetType(ST_SINGLE);
 
 	spiBegin();