The prpmc2800 platform requires a zImage formatted file with an
embedded dtb file.  Rename the requested boot image file to
dtbImage.prpmc2800.
Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Acked-by: Mark A. Greer <mgreer@mvista.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Paul Mackerras <paulus@samba.org>
 image-$(CONFIG_PPC_EFIKA)              += zImage.chrp
 image-$(CONFIG_PPC_PMAC)               += zImage.pmac
 image-$(CONFIG_PPC_HOLLY)              += zImage.holly
-image-$(CONFIG_PPC_PRPMC2800)          += zImage.prpmc2800
+image-$(CONFIG_PPC_PRPMC2800)          += dtbImage.prpmc2800
 image-$(CONFIG_PPC_ISERIES)            += zImage.iseries
 image-$(CONFIG_DEFAULT_UIMAGE)         += uImage