soc/intel/common/systemagent: Fix grammer in comments

Change-Id: I62d0e324329fdde599e67efb23f813e3b3c650ef
Signed-off-by: Yuchi Chen <yuchi.chen@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84199
Reviewed-by: Nicholas Chin <nic.c3.14@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Shuo Liu <shuo.liu@intel.com>

src/soc/intel/common/block/systemagent/systemagent.c

@@ -274,7 +274,7 @@ static void systemagent_read_resources(struct device *dev)
 	int index = 0;
 
 	/**
-	 * If SoC has multiple PCIe domains, only reading resources from the first one.
+	 * If SoC has multiple PCIe domains, only read resources from the first one.
 	 */
 	if (!is_dev_on_domain0(dev))
 		return;