Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/sound/pci/sis7019.c b/sound/pci/sis7019.c
index 1b8f674..2b5c7a95 100644
--- a/sound/pci/sis7019.c
+++ b/sound/pci/sis7019.c
@@ -308,7 +308,7 @@
 	u32 intr, status;
 
 	/* We only use the DMA interrupts, and we don't enable any other
-	 * source of interrupts. But, it is possible to see an interupt
+	 * source of interrupts. But, it is possible to see an interrupt
 	 * status that didn't actually interrupt us, so eliminate anything
 	 * we're not expecting to avoid falsely claiming an IRQ, and an
 	 * ensuing endless loop.
@@ -773,7 +773,7 @@
 		vperiod = 0;
 	}
 
-	/* The interrupt handler implements the timing syncronization, so
+	/* The interrupt handler implements the timing synchronization, so
 	 * setup its state.
 	 */
 	timing->flags |= VOICE_SYNC_TIMING;
@@ -1139,7 +1139,7 @@
 	 */
 	outl(SIS_DMA_CSR_PCI_SETTINGS, io + SIS_DMA_CSR);
 
-	/* Reset the syncronization groups for all of the channels
+	/* Reset the synchronization groups for all of the channels
 	 * to be asyncronous. If we start doing SPDIF or 5.1 sound, etc.
 	 * we'll need to change how we handle these. Until then, we just
 	 * assign sub-mixer 0 to all playback channels, and avoid any