km/common: fix ramfs development target

Calucations of PRAM needs to take into account the 'rootfssize'.
Memory available to the linux kernel 'mem=' is in all cases set to the total
memory size minus the pram size.

Signed-off-by: Andreas Huber <andreas.huber@keymile.com>
Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
cc: Wolfgang Denk <wd@denx.de>
diff --git a/board/keymile/scripts/ramfs-common.txt b/board/keymile/scripts/ramfs-common.txt
index 9315500..c1b45ab 100644
--- a/board/keymile/scripts/ramfs-common.txt
+++ b/board/keymile/scripts/ramfs-common.txt
@@ -1,11 +1,10 @@
-addramfs=setenv bootargs "${bootargs} mem=${rootfsaddr} phram.phram=rootfs${boot_bank},${rootfsaddr},${rootfssize}"
+addramfs=setenv bootargs "${bootargs} phram.phram=rootfs${boot_bank},${rootfsaddr},${rootfssize}"
 actual_bank=-1
 altbootcmd=run ${subbootcmds}
 bootcmd=run ${subbootcmds}
 subbootcmds=tftpfdt tftpkernel setrootfsaddr tftpramfs flashargs add_default addpanic addramfs boot
 nfsargs=setenv bootargs root=/dev/nfs rw nfsroot=${serverip}:${rootpath}
-configure=km_setboardid && run setramfspram && saveenv && reset
-setramfspram=setexpr value 0 + ${rootfssize} && setexpr value 0x${value} / 0x400 && setexpr value 0x${value} + ${pram} && setenv pram 0x${value}
+configure=km_setboardid && saveenv && reset
 rootfsfile=${hostname}/rootfsImage
 setrootfsaddr=setexpr value ${pnvramaddr} - ${rootfssize} && setenv rootfsaddr 0x${value}
 tftpkernel=tftpboot ${load_addr_r} ${hostname}/uImage