remove unused variables from Makefile.boot

Signed-off-by: Florian Fainelli <florian@openwrt.org>

SVN-Revision: 34392

target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/Makefile.boot

@@ -1,6 +1,4 @@
     zreladdr-y := 0x00008000
- params_phys-y := 0x00000008
- initrd_phys-y := 0x00400000
 
 dtb-$(CONFIG_MACH_DLAN_USB_EXT) += dlan-usb-extender.dtb
 dtb-$(CONFIG_MACH_RBT_832) += rbt-832.dtb