soc/mediatek/early_init: Fix function return type

Fix return type of early_init_get_elapsed_time_us() to comply with the
data type of return value.

Also replace memset() with struct initializer.

Signed-off-by: Jianjun Wang <jianjun.wang@mediatek.com>
Fixes: commit 41faa22 (soc/mediatek: Add early_init for passing data
       across stages)
Change-Id: I7c361828362c2dfec91358ad8a420f5360243da0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63190
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

0 files changed, 0 insertions, 0 deletions