zephyr: replace zephyr integer types with C99 types

	git grep -l 'u\(8\|16\|32\|64\)_t' | \
		xargs sed -i "s/u\(8\|16\|32\|64\)_t/uint\1_t/g"
	git grep -l 's\(8\|16\|32\|64\)_t' | \
		xargs sed -i "s/s\(8\|16\|32\|64\)_t/int\1_t/g"

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
diff --git a/kernel/mem_slab.c b/kernel/mem_slab.c
index 6c4dc80..7c51689 100644
--- a/kernel/mem_slab.c
+++ b/kernel/mem_slab.c
@@ -31,7 +31,7 @@
  */
 static int create_free_list(struct k_mem_slab *slab)
 {
-	u32_t j;
+	uint32_t j;
 	char *p;
 
 	/* blocks must be word aligned */
@@ -80,7 +80,7 @@
 	 CONFIG_KERNEL_INIT_PRIORITY_OBJECTS);
 
 int k_mem_slab_init(struct k_mem_slab *slab, void *buffer,
-		    size_t block_size, u32_t num_blocks)
+		    size_t block_size, uint32_t num_blocks)
 {
 	int rc = 0;