voyager: use struct instead of PARAM

Use struct boot_params instead of PARAM + 0xoffsets.
Fixes one of many Voyager build problems.

arch/x86/kernel/setup_32.c:543: error: 'PARAM' undeclared (first use in this function)

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>