omap24xx: fix 'reset_timer_masked' declaration error

omap24xx: fix 'reset_timer_masked' declaration error

Commit 17659d7 "Timer: Remove reset_timer_masked()" introduced a
static declaration for reset_timer_masked() which causes build errors:

timer.c:45: error: static declaration of 'reset_timer_masked' follows non-static declaration
include/asm/u-boot-arm.h:70: error: previous declaration of 'reset_timer_masked' was here

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Graeme Russ <graeme.russ@gmail.com>
Cc: Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Cc: Sandeep Paulraj <s-paulraj@ti.com>