ipl_tools/proc.{c,h}: Restrict header scope

Optimize dependency management by limiting header inclusions to
implementation files where possible. This reduces hidden dependencies,
improves modularity, and enhances compilation performance.

Signed-off-by: Jan Polensky <japo@linux.ibm.com>
Reviewed-by: Jan Höppner <hoeppner@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

ipl_tools/proc.c

@@ -16,6 +16,7 @@
 #include <sys/stat.h>
 #include <sys/sysmacros.h>
 #include <unistd.h>
+#include <ctype.h>
 
 #include "ipl_tools.h"
 #include "proc.h"

ipl_tools/proc.h

@@ -12,7 +12,6 @@
 #ifndef PROC_H
 #define PROC_H
 
-#include <ctype.h>
 #include <sys/types.h>
 
 struct proc_part_entry {