Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index cf7acbc..f8380ce 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -2839,7 +2839,7 @@
 		bmdma_stopped = true;
 
 		if (unlikely(host_stat & ATA_DMA_ERR)) {
-			/* error when transfering data to/from memory */
+			/* error when transferring data to/from memory */
 			qc->err_mask |= AC_ERR_HOST_BUS;
 			ap->hsm_task_state = HSM_ST_ERR;
 		}
@@ -3032,7 +3032,7 @@
 	 * Or maybe I'm just being paranoid.
 	 *
 	 * FIXME: The posting of this write means I/O starts are
-	 * unneccessarily delayed for MMIO
+	 * unnecessarily delayed for MMIO
 	 */
 }
 EXPORT_SYMBOL_GPL(ata_bmdma_start);