trivial: Fix misspelling of firmware

Fix misspelling of firmware.

Signed-off-by: Nick Andrew <nick@nick-andrew.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 76262d8..b450a26 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -379,7 +379,7 @@
 	ATA_HORKAGE_BRIDGE_OK	= (1 << 10),	/* no bridge limits */
 	ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
 						    not multiple of 16 bytes */
-	ATA_HORKAGE_FIRMWARE_WARN = (1 << 12),	/* firwmare update warning */
+	ATA_HORKAGE_FIRMWARE_WARN = (1 << 12),	/* firmware update warning */
 	ATA_HORKAGE_1_5_GBPS	= (1 << 13),	/* force 1.5 Gbps */
 
 	 /* DMA mask for user DMA control: User visible values; DO NOT