s390/cio: remove unused include linux/spinlock.h from cio.h

* The linux/spinlock.h header was included indirectly by the decompressor
  and brought unnecessary build dependencies.
* Use proper includes in files which either directly or indirectly included
  cio.h and were hidden until now by the included linux/spinlock.h, e.g.
  linux/string.h for memcpy() or asm/page.h for PAGE_SIZE.
Signed-off-by: NAlexander Egorenkov <egorenar@linux.ibm.com>
Acked-by: NHeiko Carstens <hca@linux.ibm.com>
Acked-by: NVasily Gorbik <gor@linux.ibm.com>
Signed-off-by: NHeiko Carstens <hca@linux.ibm.com>

arch/s390/boot/mem_detect.c

 // SPDX-License-Identifier: GPL-2.0
 #include <linux/errno.h>
 #include <linux/init.h>
+#include <asm/setup.h>
+#include <asm/processor.h>
 #include <asm/sclp.h>
 #include <asm/sections.h>
 #include <asm/mem_detect.h>

arch/s390/include/asm/cio.h

@@ -5,7 +5,6 @@
 #ifndef _ASM_S390_CIO_H_
 #define _ASM_S390_CIO_H_
 
-#include <linux/spinlock.h>
 #include <linux/bitops.h>
 #include <linux/genalloc.h>
 #include <asm/types.h>

arch/s390/include/asm/ipl.h

@@ -12,6 +12,7 @@
 #include <asm/types.h>
 #include <asm/cio.h>
 #include <asm/setup.h>
+#include <asm/page.h>
 #include <uapi/asm/ipl.h>
 
 struct ipl_parameter_block {

arch/s390/kernel/ipl_vmparm.c

 // SPDX-License-Identifier: GPL-2.0
+#include <linux/minmax.h>
+#include <linux/string.h>
 #include <asm/ebcdic.h>
 #include <asm/ipl.h>