ARM: OMAP2+: fix kernel-doc warnings

ARM: OMAP2+: fix kernel-doc warnings

Use the correct function name in a comment.
Add the return value documentation for one function.

These changes prevent these warnings:

wd_timer.c:76: warning: expecting prototype for omap2_wdtimer_reset(). Prototype was for omap2_wd_timer_reset() instead
wd_timer.c:76: warning: No description found for return value of 'omap2_wd_timer_reset'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Tony Lindgren <tony@atomide.com>
Cc: linux-omap@vger.kernel.org
Cc: Russell King <linux@armlinux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
Cc: patches@armlinux.org.uk
Message-ID: <20240117011004.22669-14-rdunlap@infradead.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>