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/base.c b/src/base.c
index 86bacea..5e652cc 100644
--- a/src/base.c
+++ b/src/base.c
@@ -1,7 +1,8 @@
-#include <endian.h>
-#include <string.h>
-
 #include "base.h"
+#include "pldm_types.h"
+#include <endian.h>
+#include <stdint.h>
+#include <string.h>
 
 uint8_t pack_pldm_header(const struct pldm_header_info *hdr,
 			 struct pldm_msg_hdr *msg)