Tegra: enable 'signed-comparison' compilation warning/errors

This patch enables the 'sign-compare' flag, to enable warning/errors
for comparisons between signed/unsigned variables. The warning has
been enabled for all the Tegra platforms, to start with.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
diff --git a/lib/xlat_tables_v2/xlat_tables_internal.c b/lib/xlat_tables_v2/xlat_tables_internal.c
index 2d556e6..e1a252b 100644
--- a/lib/xlat_tables_v2/xlat_tables_internal.c
+++ b/lib/xlat_tables_v2/xlat_tables_internal.c
@@ -37,7 +37,7 @@
  */
 static int xlat_table_get_index(xlat_ctx_t *ctx, const uint64_t *table)
 {
-	for (int i = 0; i < ctx->tables_num; i++)
+	for (unsigned int i = 0; i < ctx->tables_num; i++)
 		if (ctx->tables[i] == table)
 			return i;
 
@@ -53,7 +53,7 @@
 /* Returns a pointer to an empty translation table. */
 static uint64_t *xlat_table_get_empty(xlat_ctx_t *ctx)
 {
-	for (int i = 0; i < ctx->tables_num; i++)
+	for (unsigned int i = 0; i < ctx->tables_num; i++)
 		if (ctx->tables_mapped_regions[i] == 0)
 			return ctx->tables[i];
 
@@ -203,7 +203,7 @@
 				     const uintptr_t table_base_va,
 				     uint64_t *const table_base,
 				     const int table_entries,
-				     const int level)
+				     const unsigned int level)
 {
 	assert(level >= ctx->base_level && level <= XLAT_TABLE_LEVEL_MAX);
 
@@ -468,7 +468,7 @@
 				   const uintptr_t table_base_va,
 				   uint64_t *const table_base,
 				   const int table_entries,
-				   const int level)
+				   const unsigned int level)
 {
 	assert(level >= ctx->base_level && level <= XLAT_TABLE_LEVEL_MAX);
 
@@ -1053,14 +1053,14 @@
 
 	/* All tables must be zeroed before mapping any region. */
 
-	for (int i = 0; i < ctx->base_table_entries; i++)
+	for (unsigned int i = 0; i < ctx->base_table_entries; i++)
 		ctx->base_table[i] = INVALID_DESC;
 
-	for (int j = 0; j < ctx->tables_num; j++) {
+	for (unsigned int j = 0; j < ctx->tables_num; j++) {
 #if PLAT_XLAT_TABLES_DYNAMIC
 		ctx->tables_mapped_regions[j] = 0;
 #endif
-		for (int i = 0; i < XLAT_TABLE_ENTRIES; i++)
+		for (unsigned int i = 0; i < XLAT_TABLE_ENTRIES; i++)
 			ctx->tables[j][i] = INVALID_DESC;
 	}
 
diff --git a/lib/xlat_tables_v2/xlat_tables_private.h b/lib/xlat_tables_v2/xlat_tables_private.h
index 7b3e555..83e0b6e 100644
--- a/lib/xlat_tables_v2/xlat_tables_private.h
+++ b/lib/xlat_tables_v2/xlat_tables_private.h
@@ -52,7 +52,7 @@
 	 * null entry.
 	 */
 	mmap_region_t *mmap;
-	int mmap_num;
+	unsigned int mmap_num;
 
 	/*
 	 * Array of finer-grain translation tables.
@@ -60,7 +60,7 @@
 	 * contain both level-2 and level-3 entries.
 	 */
 	uint64_t (*tables)[XLAT_TABLE_ENTRIES];
-	int tables_num;
+	unsigned int tables_num;
 	/*
 	 * Keep track of how many regions are mapped in each table. The base
 	 * table can't be unmapped so it isn't needed to keep track of it.
@@ -69,14 +69,14 @@
 	int *tables_mapped_regions;
 #endif /* PLAT_XLAT_TABLES_DYNAMIC */
 
-	int next_table;
+	unsigned int next_table;
 
 	/*
 	 * Base translation table. It doesn't need to have the same amount of
 	 * entries as the ones used for other levels.
 	 */
 	uint64_t *base_table;
-	int base_table_entries;
+	unsigned int base_table_entries;
 
 	/*
 	 * Max Physical and Virtual addresses currently in use by the
@@ -87,10 +87,10 @@
 	uintptr_t max_va;
 
 	/* Level of the base translation table. */
-	int base_level;
+	unsigned int base_level;
 
 	/* Set to 1 when the translation tables are initialized. */
-	int initialized;
+	unsigned int initialized;
 
 	/*
 	 * Bit mask that has to be ORed to the rest of a translation table