s390/ipl: provide uapi header for list directed IPL

The IPL parameter block is used as an interface between Linux and
the machine to query and change the boot device and boot options.
To be able to create IPL parameter block in user space and pass it
as segment to kexec provide an uapi header with proper structure
definitions for the block.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/boot/ipl_parm.c

@@ -106,12 +106,12 @@ static void append_ipl_block_parm(void)
 	delim = early_command_line + len;    /* '\0' character position */
 	parm = early_command_line + len + 1; /* append right after '\0' */
 
-	switch (ipl_block.hdr.pbt) {
-	case DIAG308_IPL_TYPE_CCW:
+	switch (ipl_block.pb0_hdr.pbt) {
+	case IPL_PBT_CCW:
 		rc = ipl_block_get_ascii_vmparm(
 			parm, COMMAND_LINE_SIZE - len - 1, &ipl_block);
 		break;
-	case DIAG308_IPL_TYPE_FCP:
+	case IPL_PBT_FCP:
 		rc = ipl_block_get_ascii_scpdata(
 			parm, COMMAND_LINE_SIZE - len - 1, &ipl_block);
 		break;
@@ -238,8 +238,8 @@ void setup_memory_end(void)
 {
 #ifdef CONFIG_CRASH_DUMP
 	if (!OLDMEM_BASE && ipl_block_valid &&
-	    ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP &&
-	    ipl_block.fcp.opt == DIAG308_IPL_OPT_DUMP) {
+	    ipl_block.pb0_hdr.pbt == IPL_PBT_FCP &&
+	    ipl_block.fcp.opt == IPL_PB0_FCP_OPT_DUMP) {
 		if (!sclp_early_get_hsa_size(&memory_end) && memory_end)
 			memory_end_set = 1;
 	}