[ARM] 4248/1: lh7a40x: fix missing definitions for get_irqnr_preamble

commit f80dff9d missed the needed
definitions within the #elif blocks in
include/asm-arm/arch-lh7a40x/entry-macro.S

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>