Switch to new grub-mkimage syntax

util/powerpc/ieee1275/grub-mkrescue.in

@@ -30,7 +30,7 @@ target_cpu=@target_cpu@
 platform=@platform@
 pkglibdir=${libdir}/`echo ${PACKAGE_TARNAME}/${target_cpu}-${platform} | sed ${transform}`
 
-grub_mkimage=${bindir}/`echo grub-mkelfimage | sed ${transform}`
+grub_mkimage=${bindir}/`echo grub-mkimage | sed ${transform}`
 
 # Usage: usage
 # Print the usage.
@@ -104,7 +104,7 @@ boot_dir=${iso_dir}/boot/grub
 mkdir ${iso_dir}/boot
 mkdir ${boot_dir}
 core_img=${boot_dir}/grub.img
-${grub_mkimage} -n -d ${input_dir}/ -o ${core_img} ${modules}
+${grub_mkimage} -O powerpc-ieee1275 -n -d ${input_dir}/ -o ${core_img} ${modules}
 genisoimage -hfs -part -no-desktop -r -J -o ${output_image} \
  -map ${map_file} -hfs-bless ${boot_dir} -chrp-boot -sysid PPC \
  ${iso_dir}