[ARM] 4452/1: Force the literal pool dump before reloc_end

In the arch/arm/boot/compressed/head.S file, the contents of the
literal pool accumulated during the relocatable code must be dumped
before reloc_end.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>