Fix includes using iwyu tool

These changes are done by running iwyu manually under clang14.

IWYU can increase readability, make maintenance easier, and avoid errors
in some cases. See details in
```
https: //github.com/include-what-you-use/include-what-you-use/blob/master/docs/WhyIWYU.md.
```
Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
Change-Id: Idaaeffd78c9ad7db2b41a057d40f889ade297c55
diff --git a/src/fru.c b/src/fru.c
index fa79f2b..be9d411 100644
--- a/src/fru.c
+++ b/src/fru.c
@@ -1,9 +1,12 @@
 #include <assert.h>
 #include <endian.h>
 #include <stdbool.h>
+#include <stdint.h>
 #include <string.h>
 
+#include "base.h"
 #include "fru.h"
+#include "utils.h"
 
 int encode_get_fru_record_table_metadata_req(uint8_t instance_id,
 					     struct pldm_msg *msg,