s390: Remove ELF_MACHINE from cpu.h

The bootloader can just pass EM_S390 directly, as that
is architecture specific code.

This removes another architecture specific definition from the global
namespace.

Cc: Richard Henderson <rth@twiddle.net>
Cc: Alexander Graf <agraf@suse.de>
Reviewed-by: NRichard Henderson <rth@twiddle.net>
Acked-By: NRiku Voipio <riku.voipio@linaro.org>
Signed-off-by: NPeter Crosthwaite <crosthwaite.peter@gmail.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

hw/s390x/ipl.c

@@ -132,7 +132,7 @@ static int s390_ipl_init(SysBusDevice *dev)
 
         bios_size = load_elf(bios_filename, bios_translate_addr, &fwbase,
                              &ipl->bios_start_addr, NULL, NULL, 1,
-                             ELF_MACHINE, 0);
+                             EM_S390, 0);
         if (bios_size > 0) {
             /* Adjust ELF start address to final location */
             ipl->bios_start_addr += fwbase;
@@ -154,7 +154,7 @@ static int s390_ipl_init(SysBusDevice *dev)
 
     if (ipl->kernel) {
         kernel_size = load_elf(ipl->kernel, NULL, NULL, &pentry, NULL,
-                               NULL, 1, ELF_MACHINE, 0);
+                               NULL, 1, EM_S390, 0);
         if (kernel_size < 0) {
             kernel_size = load_image_targphys(ipl->kernel, 0, ram_size);
         }

target-s390x/cpu.h

@@ -27,7 +27,6 @@
 
 #define TARGET_LONG_BITS 64
 
-#define ELF_MACHINE	EM_S390
 #define ELF_MACHINE_UNAME "S390X"
 
 #define CPUArchState struct CPUS390XState