video: ld9040: Fix unused variable warnings

The variables SEQ_SWRESET, SEQ_ELVSS_ON, SEQ_TEMP_SWIRE, SEQ_APON and
SEQ_SLPIN are unreferenced, drop.

Cc: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>