EDAC, i82975x: Fix spelling mistake "reserverd" -> "reserved"

Fix a spelling mistake in a register layout description.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: "Arvind R." <arvino55@gmail.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: https://lkml.kernel.org/r/20181120153304.1218-1-alexandre.belloni@bootlin.com

drivers/edac/i82975x_edac.c

@@ -104,7 +104,7 @@ NOTE: Only ONE of the three must be enabled
 					 *
 					 * 31:14 Base Addr of 16K memory-mapped
 					 *	configuration space
-					 * 13:1  reserverd
+					 * 13:1  reserved
 					 *  0    mem-mapped config space enable
 					 */