ARM: bootscript: Fix the nfsargs and addip in K+P's tpcboot.cmd

The quotes around ${bootargs} were missing as we elaborate those variables
twice - once when we "setenv" the command and secondly when we "run" it.
Without quotes we have just empty string in the second call.

Moreover there is an issue with line breaks - as the original commands
got truncated.

Signed-off-by: Lukasz Majewski <lukma@denx.de>

board/k+p/bootscripts/tpcboot.cmd

@@ -65,17 +65,14 @@ fi"
 #
 # Provide 'boot_nfs' command
 #------------------------------------------------------------
-setenv nfsargs "setenv bootargs root=/dev/nfs rw \
-       nfsroot=${serverip}:${rootpath},nolock,nfsvers=3"
-setenv addip "setenv bootargs ${bootargs} \
-       ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:\
-       ${hostname}:eth0:on"
+setenv nfsargs "setenv bootargs root=/dev/nfs rw nfsroot='${serverip}':'${rootpath}',nolock,nfsvers=3"
+setenv addip "setenv bootargs '${bootargs}' ip='${ipaddr}':'${serverip}':'${gatewayip}':'${netmask}':'${hostname}':eth0:on"
 
 setenv boot_nfs "
 if run download_kernel; then
 	run nfsargs;
 	run addip;
-	setenv bootargs ${bootargs} console=${console};
+	setenv bootargs '${bootargs}' console=${console};
 
 	run boot_fitImage;
 fi"