[PATCH 0/5] Makefile.boot cleanup

[Eric Miao]

Several facts:

1. ZRELADDR in most cases can be auto detected by maksing PC with
   0xf000_0000 if the zImage is placed within the first 256MiB from
   the memory start, which is a sane assumption except for:

   - when ARCH_MX1 or ARCH_SHARK is defined
   - when ARCH_U300 is defined (U300 really is strange when defining
     PHYS_OFFSET and ZRELADDR)
   - or when ZBOOT_ROM is defined

2. For the exceptions above or those situations where ZRELADDR still
   needs to be specified, an option CONFIG_ZRELADDR is provided. So
   if there is conflict when mutliple machines are selected (in the
   near future), things can be manually fixed by menuconfig, instead
   of playing tricks with Makefile.

3. INITRD_PHYS and PARAMS_PHYS are really used only for bootpImage,
   and references in arch/arm/boot/compressed can be safely removed

I've listed most of the zreladdr-y found in each Makefile.boot and
made them default value in CONFIG_ZRELADDR, but still there could be
mistakes. Please kindly try and report back, thanks.