cpu/x86/pae/pgtbl.c: Unsigned comparison < 0 always false

Comparison of unsigned expression < 0 is always false.

Change-Id: Idf4e7846b50f4376a5d33515681efbd773d1caca
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/6146
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
diff --git a/src/cpu/x86/pae/pgtbl.c b/src/cpu/x86/pae/pgtbl.c
index 9354738..9be415d 100644
--- a/src/cpu/x86/pae/pgtbl.c
+++ b/src/cpu/x86/pae/pgtbl.c
@@ -61,7 +61,7 @@
 	void *result;
 	int i;
 	index = cpu_index();
-	if ((index < 0) || (index >= CONFIG_MAX_CPUS)) {
+	if (index >= CONFIG_MAX_CPUS) {
 		return MAPPING_ERROR;
 	}
 	window = page >> 10;