fundamental: move string includes from chid-fundamental.c to header

src/fundamental/chid-fundamental.c

@@ -15,12 +15,10 @@
  */
 
 #if SD_BOOT
-#  include "efi-string.h"
 #  include "util.h"
 #else
 #  include <byteswap.h>
 #  include <string.h>
-#  include <uchar.h>
 #  include <utf8.h>
 #define strsize16(str) ((char16_strlen(str) + 1) * sizeof(char16_t))
 #endif

src/fundamental/chid-fundamental.h

@@ -2,6 +2,12 @@
 
 #pragma once
 
+#if SD_BOOT
+#  include "efi-string.h"
+#else
+#  include <uchar.h>
+#endif
+
 #include "efi-fundamental.h"
 #include "string-util-fundamental.h"