northbridge/intel/haswell: Add space around operators

Change-Id: I8fa1e39bfd950475e3b55d6debcbfd92615aa379
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/16628
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/src/northbridge/intel/haswell/acpi/hostbridge.asl b/src/northbridge/intel/haswell/acpi/hostbridge.asl
index e3c7d11..2565851 100644
--- a/src/northbridge/intel/haswell/acpi/hostbridge.asl
+++ b/src/northbridge/intel/haswell/acpi/hostbridge.asl
@@ -144,7 +144,7 @@
 	}
 
 	/*
-	 * Search CPU0 _PSS looking for control=arg0 and then
+	 * Search CPU0 _PSS looking for control = arg0 and then
 	 * return previous P-state entry number for new _PPC
 	 *
 	 * Format of _PSS: