fix kernel commandline "parsing" -> do not always cut off the last

[linexec-j720] / asm / test123.asm

loopl   ldr             r5, =0xA0051000                                 ; right before we jump in
        ldr             r6, =0xA0051100
        ldr             r8, =0xFE00FE00
        str     r8, [r5] 
        add             r5, r5, #0x04
        cmp                     r5,r6
        blt             loopl