zipl: remove libc.h include in s390.h

This allows the use of s390.h in combination with other libc
implementations than our minimal libc, e.g. with glibc.

Reviewed-by: Philipp Rudo <prudo@linux.ibm.com>
Reviewed-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

zipl/boot/s390.h

@@ -12,7 +12,6 @@
 #define S390_H
 
 #include "lib/zt_common.h"
-#include "libc.h"
 #include "boot/sigp.h"
 
 

zipl/boot/sclp.c

@@ -9,6 +9,7 @@
  * it under the terms of the MIT license. See LICENSE for details.
  */
 
+#include "libc.h"
 #include "error.h"
 #include "s390.h"
 #include "sclp.h"

zipl/boot/sclp_stage3.c

@@ -9,6 +9,7 @@
  * it under the terms of the MIT license. See LICENSE for details.
  */
 
+#include "libc.h"
 #include "sclp.h"
 #include "sclp_stage3.h"
 

zipl/boot/stage2dump.c

@@ -13,6 +13,7 @@
 
 #include "lib/zt_common.h"
 
+#include "libc.h"
 #include "error.h"
 #include "sclp.h"
 #include "stage2dump.h"