fbdev: sh_mobile_hdmi: fix up compiler warnings.

  CC      drivers/video/sh_mobile_hdmi.o
drivers/video/sh_mobile_hdmi.c: In function 'sh_hdmi_avi_infoframe_setup':
drivers/video/sh_mobile_hdmi.c:539: warning: unused variable 'var'
drivers/video/sh_mobile_hdmi.c: In function 'sh_hdmi_clk_configure':
drivers/video/sh_mobile_hdmi.c:1021: warning: unused variable 'pdata'

Signed-off-by: Paul Mundt <lethal@linux-sh.org>