A driver using fiq functions should be usable on targets with or without CONFIG_FIQ enabled. Instead of making code dependent on #ifdef CONFIG_FIQ, add empty stubs for the fiq functions. Change-Id: Ie8b1905ba53664d99bd707be3c83291c97eb1066 Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>